diff --git a/.gitea/workflows/deploy.yaml b/.gitea/workflows/deploy.yaml
index 6fe48ab..0b42f52 100644
--- a/.gitea/workflows/deploy.yaml
+++ b/.gitea/workflows/deploy.yaml
@@ -10,6 +10,10 @@ jobs:
   build:
     runs-on: ubuntu-latest
 
+    env:
+      ACCESS_TOKEN_SECRET: ${{ secrets.ACCESS_TOKEN_SECRET }}
+      REFRESH_TOKEN_SECRET: ${{ secrets.REFRESH_TOKEN_SECRET }}
+
     steps:
       - name: Checkout repository
         uses: actions/checkout@v4
@@ -32,6 +36,9 @@ jobs:
       - name: Build and Push Server
         run: |
           echo "🚀 Building Server..."
-          docker buildx build --load -t crylia/japanese-srs-trainer-wanikani-server:latest -f server/Dockerfile server
+          docker buildx build \
+            --build-arg ACCESS_TOKEN_SECRET=${ACCESS_TOKEN_SECRET} \
+            --build-arg REFRESH_TOKEN_SECRET=${REFRESH_TOKEN_SECRET} \
+            --load -t crylia/japanese-srs-trainer-wanikani-server:latest -f server/Dockerfile server
           docker tag crylia/japanese-srs-trainer-wanikani-server:latest 192.168.0.26:5008/japanese-srs-trainer-wanikani-server:latest
           docker push 192.168.0.26:5008/japanese-srs-trainer-wanikani-server:latest
diff --git a/.gitignore b/.gitignore
index 3c3629e..2774f14 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1 +1,40 @@
-node_modules
+# Node modules
+node_modules/
+**/node_modules/
+
+# Vite / Vue build output
+dist/
+build/
+.vite/
+
+# Logs
+npm-debug.log*
+yarn-debug.log*
+pnpm-debug.log*
+
+# Environment files
+.env
+.env.local
+.env.*.local
+
+# TypeScript
+*.tsbuildinfo
+
+# VSCode
+.vscode/
+
+# JetBrains
+.idea/
+
+# System
+.DS_Store
+Thumbs.db
+
+# Lint / Typegen
+*.d.ts
+*.eslintcache
+
+
+# Ignore temporary files
+*.tmp
+*.temp
diff --git a/client/.dockerignore b/client/.dockerignore
new file mode 100644
index 0000000..a698bb1
--- /dev/null
+++ b/client/.dockerignore
@@ -0,0 +1,27 @@
+# Node modules
+node_modules
+**/node_modules
+
+# Git
+.git
+.gitignore
+
+# Logs
+*.log
+
+# Local dev / editor
+.vscode
+.idea
+
+# Build output
+dist
+build
+.vite
+
+# TypeScript build info
+*.tsbuildinfo
+
+# Environment files (if you want them injected via Docker ENV)
+.env
+.env.local
+.env.*.local
diff --git a/client/src/pages/index.vue b/client/src/pages/index.vue
index 1929398..dcc312e 100644
--- a/client/src/pages/index.vue
+++ b/client/src/pages/index.vue
@@ -1,5 +1,10 @@
 <template lang="pug">
-v-container.fill-height.d-flex.justify-center.align-center
+v-container.fill-height.d-flex.justify-center.align-center.position-relative
+  v-btn.position-absolute.top-0.right-0.ma-4(
+    color="error"
+    variant="outlined"
+    @click="logoutHandler"
+  ) Logout
   v-card.pa-8.pb-6(
     elevation="12"
     rounded="xl"
@@ -134,12 +139,14 @@ v-container.fill-height.d-flex.justify-center.align-center
 <script lang="ts" setup>
 import { onMounted, ref } from 'vue'
 import { useRouter } from 'vue-router'
+import { useAuthStore } from '../stores/auth'
 
 import { Reviews } from '../composables/subject.ts'
 
 const reviews = ref<Reviews | null>()
 
 const router = useRouter()
+const auth = useAuthStore()
 const apiKey = ref<string>('')
 const direction = ref<'en->jp' | 'jp->en' | 'both'>('jp->en')
 const stats = ref<{ kanjiCount: number, vocabCount: number }>({
@@ -153,6 +160,11 @@ const options = ref({
   kanji: false,
 })
 
+async function logoutHandler() {
+  await auth.logout()
+  router.push('/login')
+}
+
 function _startTraining(type: 'kanji' | 'vocab' | 'all' | 'writing') {
   router.push({
     path: '/' + type,
diff --git a/client/src/pages/login.vue b/client/src/pages/login.vue
new file mode 100644
index 0000000..e0ad21e
--- /dev/null
+++ b/client/src/pages/login.vue
@@ -0,0 +1,56 @@
+<template lang="pug">
+  v-container.fill-height.d-flex.justify-center.align-center
+    v-card.elevation-12.rounded-lg.pa-8(style="max-width: 400px; width: 100%;")
+      v-card-title.text-h4.text-center.font-weight-bold.mb-6 Login
+      v-card-text
+        v-form
+          v-text-field(
+            label="Username"
+            prepend-inner-icon="mdi-account"
+						v-model="username"
+            outlined
+            dense
+            required
+          )
+          v-text-field(
+            label="Password"
+            prepend-inner-icon="mdi-lock"
+            type="password"
+						v-model="password"
+            outlined
+            dense
+            required
+          )
+          v-checkbox(
+            label="Remember me"
+            class="my-4"
+          )
+          v-btn(
+            color="primary"
+            large
+            block
+						@click="loginHandler"
+          ) Login
+      v-card-actions.justify-center
+        span.text-caption Don't have an account?
+        v-btn.text.small( color="primary") Sign Up
+</template>
+
+<script lang="ts" setup>
+import { ref } from 'vue'
+import { useRouter } from 'vue-router'
+import { useAuthStore } from '../stores/auth'
+
+const router = useRouter()
+
+const auth = useAuthStore()
+
+const username = ref('')
+const password = ref('')
+
+async function loginHandler() {
+  const success = await auth.login(username.value, password.value)
+  if (success) router.push('/')
+  else console.error(auth.error)
+}
+</script>
diff --git a/client/src/router/index.ts b/client/src/router/index.ts
index 6379d4a..5e087c2 100644
--- a/client/src/router/index.ts
+++ b/client/src/router/index.ts
@@ -8,6 +8,7 @@
 import { createRouter, createWebHistory } from 'vue-router'
 import { setupLayouts } from 'virtual:generated-layouts'
 import { routes } from 'vue-router/auto-routes'
+import { useAuthStore } from '../stores/auth.ts'
 
 const router = createRouter({
   history: createWebHistory(import.meta.env.BASE_URL),
@@ -33,4 +34,19 @@ router.isReady().then(() => {
   localStorage.removeItem('vuetify:dynamic-reload')
 })
 
+router.beforeEach(async (to) => {
+  const auth = useAuthStore()
+  if (!auth.user && !auth.loading) {
+    await auth.fetchUser()
+  }
+
+  if (to.path === '/login') return true
+
+  if (!auth.isAuthenticated) {
+    return { path: '/login' }
+  }
+
+  return true
+})
+
 export default router
diff --git a/client/src/stores/auth.ts b/client/src/stores/auth.ts
new file mode 100644
index 0000000..e49f519
--- /dev/null
+++ b/client/src/stores/auth.ts
@@ -0,0 +1,109 @@
+import { defineStore } from 'pinia'
+import { ref } from 'vue'
+
+interface User {
+	id: number
+	username: string
+	email?: string
+}
+
+export const useAuthStore = defineStore('auth', () => {
+	const user = ref<User | null>(null)
+	const loading = ref(false)
+	const error = ref<string | null>(null)
+
+	async function fetchUser() {
+		try {
+			loading.value = true
+			const res = await fetch('/api/v1/user/info', {
+				method: 'GET',
+				credentials: 'include',
+			})
+			if (res.ok) {
+				const data = await res.json()
+				user.value = data.user
+				error.value = null
+			} else if (res.status === 401) {
+				const refreshed = await refreshToken()
+				if (refreshed) return await fetchUser()
+				user.value = null
+			} else {
+				throw new Error('Failed to fetch user')
+			}
+		} catch (err: any) {
+			error.value = err.message
+			user.value = null
+		} finally {
+			loading.value = false
+		}
+	}
+
+	async function login(username: string, password: string) {
+		try {
+			loading.value = true
+			error.value = null
+			const res = await fetch('/api/v1/auth/login', {
+				method: 'POST',
+				headers: { 'Content-Type': 'application/json' },
+				credentials: 'include',
+				body: JSON.stringify({ username, password }),
+			})
+			if (!res.ok) throw new Error('Invalid credentials')
+			const data = await res.json()
+			if (data.ok && data.user) {
+				user.value = data.user
+				return true
+			}
+			throw new Error('Login failed')
+		} catch (err: any) {
+			error.value = err.message
+			return false
+		} finally {
+			loading.value = false
+		}
+	}
+
+	async function refreshToken() {
+		if (!document.cookie.includes('refresh_token')) return false
+		try {
+			const res = await fetch('/api/v1/auth/refresh', {
+				method: 'POST',
+				credentials: 'include',
+			})
+			if (res.ok) {
+				console.info('Token refreshed')
+				return true
+			}
+			console.warn('Token refresh failed')
+			return false
+		} catch {
+			return false
+		}
+	}
+
+	async function logout() {
+		try {
+			await fetch('/api/v1/auth/logout', {
+				method: 'POST',
+				credentials: 'include',
+			})
+		} catch (err) {
+			console.warn('Logout error:', err)
+		} finally {
+			user.value = null
+		}
+	}
+
+	const isAuthenticated = computed(() => !!user.value)
+
+	return {
+		user,
+		loading,
+		error,
+		isAuthenticated,
+		login,
+		logout,
+		fetchUser,
+		refreshToken,
+	}
+})
diff --git a/client/src/typed-router.d.ts b/client/src/typed-router.d.ts
index 4701738..3aab232 100644
--- a/client/src/typed-router.d.ts
+++ b/client/src/typed-router.d.ts
@@ -21,6 +21,7 @@ declare module 'vue-router/auto-routes' {
     '/': RouteRecordInfo<'/', '/', Record<never, never>, Record<never, never>>,
     '/all': RouteRecordInfo<'/all', '/all', Record<never, never>, Record<never, never>>,
     '/kanji': RouteRecordInfo<'/kanji', '/kanji', Record<never, never>, Record<never, never>>,
+    '/login': RouteRecordInfo<'/login', '/login', Record<never, never>, Record<never, never>>,
     '/vocab': RouteRecordInfo<'/vocab', '/vocab', Record<never, never>, Record<never, never>>,
     '/writing': RouteRecordInfo<'/writing', '/writing', Record<never, never>, Record<never, never>>,
   }
@@ -48,6 +49,10 @@ declare module 'vue-router/auto-routes' {
       routes: '/kanji'
       views: never
     }
+    'src/pages/login.vue': {
+      routes: '/login'
+      views: never
+    }
     'src/pages/vocab.vue': {
       routes: '/vocab'
       views: never
diff --git a/docker-compose.yml b/docker-compose.yml
index 36ce225..55738e8 100644
--- a/docker-compose.yml
+++ b/docker-compose.yml
@@ -11,11 +11,13 @@ services:
       - ./server:/app
       - /app/node_modules
     environment:
-      - NODE_ENV=dev
+      - NODE_ENV=DEV
       - PORT=3000
     command: pnpm run dev
     networks:
       - srs-app-net
+    env_file:
+      - .env
   
   client:
     build:
@@ -29,7 +31,7 @@ services:
       - ./client:/app
       - /app/node_modules
     environment:
-      - NODE_ENV=dev
+      - NODE_ENV=DEV
       - VITE_APP_URL=http://srs-server:3000
     command: pnpm run dev
     depends_on:
diff --git a/package.json b/package.json
deleted file mode 100644
index 55455bc..0000000
--- a/package.json
+++ /dev/null
@@ -1,5 +0,0 @@
-{
-	"dependencies": {
-		"wanakana": "^5.3.1"
-	}
-}
diff --git a/pnpm-lock.yaml b/pnpm-lock.yaml
deleted file mode 100644
index 3bf260c..0000000
--- a/pnpm-lock.yaml
+++ /dev/null
@@ -1,23 +0,0 @@
-lockfileVersion: '9.0'
-
-settings:
-  autoInstallPeers: true
-  excludeLinksFromLockfile: false
-
-importers:
-
-  .:
-    dependencies:
-      wanakana:
-        specifier: ^5.3.1
-        version: 5.3.1
-
-packages:
-
-  wanakana@5.3.1:
-    resolution: {integrity: sha512-OSDqupzTlzl2LGyqTdhcXcl6ezMiFhcUwLBP8YKaBIbMYW1wAwDvupw2T9G9oVaKT9RmaSpyTXjxddFPUcFFIw==}
-    engines: {node: '>=12'}
-
-snapshots:
-
-  wanakana@5.3.1: {}
diff --git a/server/.dockerignore b/server/.dockerignore
new file mode 100644
index 0000000..a698bb1
--- /dev/null
+++ b/server/.dockerignore
@@ -0,0 +1,27 @@
+# Node modules
+node_modules
+**/node_modules
+
+# Git
+.git
+.gitignore
+
+# Logs
+*.log
+
+# Local dev / editor
+.vscode
+.idea
+
+# Build output
+dist
+build
+.vite
+
+# TypeScript build info
+*.tsbuildinfo
+
+# Environment files (if you want them injected via Docker ENV)
+.env
+.env.local
+.env.*.local
diff --git a/server/.env b/server/.env
deleted file mode 100644
index e69de29..0000000
diff --git a/server/package.json b/server/package.json
index bf79107..083cb54 100644
--- a/server/package.json
+++ b/server/package.json
@@ -8,9 +8,17 @@
 	"dependencies": {
 		"@fastify/cors": "^11.1.0",
 		"@fastify/static": "^8.2.0",
+		"@types/cookie-parser": "^1.4.9",
+		"@types/jsonwebtoken": "^9.0.10",
+		"cookie-parser": "^1.4.7",
 		"cors": "^2.8.5",
+		"dotenv": "^17.2.3",
 		"express": "^5.1.0",
+		"express-rate-limit": "^8.1.0",
 		"fastify": "^5.6.1",
+		"helmet": "^8.1.0",
+		"jsonwebtoken": "^9.0.2",
+		"ldapts": "^8.0.9",
 		"mongodb": "^6.20.0",
 		"mongoose": "^8.19.1",
 		"node": "^24.10.0",
diff --git a/server/pnpm-lock.yaml b/server/pnpm-lock.yaml
index c893174..4b2c6ac 100644
--- a/server/pnpm-lock.yaml
+++ b/server/pnpm-lock.yaml
@@ -14,15 +14,39 @@ importers:
       '@fastify/static':
         specifier: ^8.2.0
         version: 8.2.0
+      '@types/cookie-parser':
+        specifier: ^1.4.9
+        version: 1.4.9(@types/express@5.0.3)
+      '@types/jsonwebtoken':
+        specifier: ^9.0.10
+        version: 9.0.10
+      cookie-parser:
+        specifier: ^1.4.7
+        version: 1.4.7
       cors:
         specifier: ^2.8.5
         version: 2.8.5
+      dotenv:
+        specifier: ^17.2.3
+        version: 17.2.3
       express:
         specifier: ^5.1.0
         version: 5.1.0
+      express-rate-limit:
+        specifier: ^8.1.0
+        version: 8.1.0(express@5.1.0)
       fastify:
         specifier: ^5.6.1
         version: 5.6.1
+      helmet:
+        specifier: ^8.1.0
+        version: 8.1.0
+      jsonwebtoken:
+        specifier: ^9.0.2
+        version: 9.0.2
+      ldapts:
+        specifier: ^8.0.9
+        version: 8.0.9
       mongodb:
         specifier: ^6.20.0
         version: 6.20.0
@@ -192,12 +216,20 @@ packages:
   '@tsconfig/node16@1.0.4':
     resolution: {integrity: sha512-vxhUy4J8lyeyinH7Azl1pdd43GJhZH/tP2weN8TntQblOY+A0XbT8DJk1/oCPuOOyg/Ja757rG0CgHcWC8OfMA==}
 
+  '@types/asn1@0.2.4':
+    resolution: {integrity: sha512-V91DSJ2l0h0gRhVP4oBfBzRBN9lAbPUkGDMCnwedqPKX2d84aAMc9CulOvxdw1f7DfEYx99afab+Rsm3e52jhA==}
+
   '@types/body-parser@1.19.6':
     resolution: {integrity: sha512-HLFeCYgz89uk22N5Qg3dvGvsv46B8GLvKKo1zKG4NybA8U2DiEO3w9lqGg29t/tfLRJpJ6iQxnVw4OnB7MoM9g==}
 
   '@types/connect@3.4.38':
     resolution: {integrity: sha512-K6uROf1LD88uDQqJCktA4yzL1YYAK6NgfsI0v/mTgyPKWsX1CnJ0XPSDhViejru1GcRkLWb8RlzFYJRqGUbaug==}
 
+  '@types/cookie-parser@1.4.9':
+    resolution: {integrity: sha512-tGZiZ2Gtc4m3wIdLkZ8mkj1T6CEHb35+VApbL2T14Dew8HA7c+04dmKqsKRNC+8RJPm16JEK0tFSwdZqubfc4g==}
+    peerDependencies:
+      '@types/express': '*'
+
   '@types/cors@2.8.19':
     resolution: {integrity: sha512-mFNylyeyqN93lfe/9CSxOGREz8cpzAhH+E93xJ4xWQf62V8sQ/24reV2nyzUWM6H6Xji+GGHpkbLe7pVoUEskg==}
 
@@ -216,9 +248,15 @@ packages:
   '@types/json-schema@7.0.15':
     resolution: {integrity: sha512-5+fP8P8MFNC+AyZCDxrB2pkZFPGzqQWUzpSeuuVLvm8VMcorNYavBqoFcxK8bQz4Qsbn4oUEEem4wDLfcysGHA==}
 
+  '@types/jsonwebtoken@9.0.10':
+    resolution: {integrity: sha512-asx5hIG9Qmf/1oStypjanR7iKTv0gXQ1Ov/jfrX6kS/EO0OFni8orbmGCn0672NHR3kXHwpAwR+B368ZGN/2rA==}
+
   '@types/mime@1.3.5':
     resolution: {integrity: sha512-/pyBZWSLD2n0dcHE3hq8s8ZvcETHtEuF+3E7XVt0Ig2nvsVQXdghHVcEkIWjy9A0wKfTn97a/PSDYohKIlnP/w==}
 
+  '@types/ms@2.1.0':
+    resolution: {integrity: sha512-GsCCIZDE/p3i96vtEqx+7dBUGXrc7zeSK3wwPHIaRThS+9OhWIXRqzs4d6k1SVU8g91DrNRWxWUGhp5KXQb2VA==}
+
   '@types/node@24.7.2':
     resolution: {integrity: sha512-/NbVmcGTP+lj5oa4yiYxxeBjRivKQ5Ns1eSZeB99ExsEQ6rX5XYU1Zy/gGxY/ilqtD4Etx9mKyrPxZRetiahhA==}
 
@@ -304,6 +342,9 @@ packages:
   argparse@2.0.1:
     resolution: {integrity: sha512-8+9WqebbFzpX9OR+Wa6O29asIogeRMzcGtAINdpMHHyAg10f05aSFVBbcEqGf/PXw1EjAZ+q2/bEBg3DvurK3Q==}
 
+  asn1@0.2.6:
+    resolution: {integrity: sha512-ix/FxPn0MDjeyJ7i/yoHGFt/EX6LyNbxSEhPPXODPL+KB0VPk86UYfL0lMdy+KCnv+fmvIzySwaK5COwqVbWTQ==}
+
   atomic-sleep@1.0.0:
     resolution: {integrity: sha512-kNOjDqAh7px0XWNI+4QbzoiR/nTkHAWNud2uvnJquD1/x5a7EQZMJT0AczqK0Qn67oY/TTQ1LbUKajZpp3I9tQ==}
     engines: {node: '>=8.0.0'}
@@ -333,6 +374,9 @@ packages:
     resolution: {integrity: sha512-WIsKqkSC0ABoBJuT1LEX+2HEvNmNKKgnTAyd0fL8qzK4SH2i9NXg+t08YtdZp/V9IZ33cxe3iV4yM0qg8lMQng==}
     engines: {node: '>=16.20.1'}
 
+  buffer-equal-constant-time@1.0.1:
+    resolution: {integrity: sha512-zRpUiDwd/xk6ADqPMATG8vc9VPrkck7T07OIx0gnjmJAnHnTVXNQG3vfvWNuiZIkwu9KrKdA1iJKfsfTVxE6NA==}
+
   bytes@3.1.2:
     resolution: {integrity: sha512-/Nf7TyzTx6S3yRJObOAV7956r8cr2+Oj8AC5dt8wSP3BQAoeX58NoHyCU8P8zGkNXStjTSi6fzO6F0pBdcYbEg==}
     engines: {node: '>= 0.8'}
@@ -379,6 +423,13 @@ packages:
     resolution: {integrity: sha512-nTjqfcBFEipKdXCv4YDQWCfmcLZKm81ldF0pAopTvyrFGVbcR6P/VAAd5G7N+0tTr8QqiU0tFadD6FK4NtJwOA==}
     engines: {node: '>= 0.6'}
 
+  cookie-parser@1.4.7:
+    resolution: {integrity: sha512-nGUvgXnotP3BsjiLX2ypbQnWoGUPIIfHQNZkkC668ntrzGWEZVW70HDEB1qnNGMicPje6EttlIgzo51YSwNQGw==}
+    engines: {node: '>= 0.8.0'}
+
+  cookie-signature@1.0.6:
+    resolution: {integrity: sha512-QADzlaHc8icV8I7vbaJXJwod9HWYp8uCqf1xa4OfNu1T7JVxQIrUgOWtHdNDtPiywmFbiS12VjotIXLrKM3orQ==}
+
   cookie-signature@1.2.2:
     resolution: {integrity: sha512-D76uU73ulSXrD1UXF4KE2TMxVVwhsnCgfAyTg9k8P6KGZjlXKrOLe4dJQKI3Bxi5wjesZoFXJWElNWBjPZMbhg==}
     engines: {node: '>=6.6.0'}
@@ -406,6 +457,15 @@ packages:
     resolution: {integrity: sha512-0R9ikRb668HB7QDxT1vkpuUBtqc53YyAwMwGeUFKRojY/NWKvdZ+9UYtRfGmhqNbRkTSVpMbmyhXipFFv2cb/A==}
     engines: {node: '>= 12'}
 
+  debug@4.4.1:
+    resolution: {integrity: sha512-KcKCqiftBJcZr++7ykoDIEwSa3XWowTfNPo92BYxjXiyYEVrUQh2aLyhxBCwww+heortUFxEJYcRzosstTEBYQ==}
+    engines: {node: '>=6.0'}
+    peerDependencies:
+      supports-color: '*'
+    peerDependenciesMeta:
+      supports-color:
+        optional: true
+
   debug@4.4.3:
     resolution: {integrity: sha512-RGwwWnwQvkVfavKVt22FGLw+xYSdzARwm0ru6DhTVA3umU5hZc28V3kO4stgYryrTlLpuvgI9GiijltAjNbcqA==}
     engines: {node: '>=6.0'}
@@ -430,6 +490,10 @@ packages:
     resolution: {integrity: sha512-58lmxKSA4BNyLz+HHMUzlOEpg09FV+ev6ZMe3vJihgdxzgcwZ8VoEEPmALCZG9LmqfVoNMMKpttIYTVG6uDY7A==}
     engines: {node: '>=0.3.1'}
 
+  dotenv@17.2.3:
+    resolution: {integrity: sha512-JVUnt+DUIzu87TABbhPmNfVdBDt18BLOWjMUFJMSi/Qqg7NTYtabbvSNJGOJ7afbRuv9D/lngizHtP7QyLQ+9w==}
+    engines: {node: '>=12'}
+
   dunder-proto@1.0.1:
     resolution: {integrity: sha512-KIN/nDJBQRcXw0MLVhZE9iQHmG68qAVIBg9CqmUYjmQIhgij9U5MFvrqkUL5FbtyyzZuOeOt0zdeRe4UY7ct+A==}
     engines: {node: '>= 0.4'}
@@ -437,6 +501,9 @@ packages:
   eastasianwidth@0.2.0:
     resolution: {integrity: sha512-I88TYZWc9XiYHRQ4/3c5rjjfgkjhLyW2luGIheGERbNQ6OY7yTybanSpDXZa8y7VUP9YmDcYa+eyq4ca7iLqWA==}
 
+  ecdsa-sig-formatter@1.0.11:
+    resolution: {integrity: sha512-nagl3RYrbNv6kQkeJIpt6NJZy8twLB/2vtz6yN9Z4vRKHN4/QZJIEbqohALSgwKdnksuY3k5Addp5lg8sVoVcQ==}
+
   ee-first@1.1.1:
     resolution: {integrity: sha512-WMwm9LhRUo+WUaRN+vRuETqG89IgZphVSNkdFgeb6sS/E4OrDIN7t48CAewSHXc6C8lefD8KKfr5vY61brQlow==}
 
@@ -515,6 +582,12 @@ packages:
     resolution: {integrity: sha512-aIL5Fx7mawVa300al2BnEE4iNvo1qETxLrPI/o05L7z6go7fCw1J6EQmbK4FmJ2AS7kgVF/KEZWufBfdClMcPg==}
     engines: {node: '>= 0.6'}
 
+  express-rate-limit@8.1.0:
+    resolution: {integrity: sha512-4nLnATuKupnmwqiJc27b4dCFmB/T60ExgmtDD7waf4LdrbJ8CPZzZRHYErDYNhoz+ql8fUdYwM/opf90PoPAQA==}
+    engines: {node: '>= 16'}
+    peerDependencies:
+      express: '>= 4.11'
+
   express@5.1.0:
     resolution: {integrity: sha512-DT9ck5YIRU+8GYzzU5kT3eHGA5iL+1Zd0EutOmTE9Dtk+Tvuzd23VBU+ec7HPNSTxXYO55gPV/hq4pSBJDjFpA==}
     engines: {node: '>= 18'}
@@ -649,6 +722,10 @@ packages:
     resolution: {integrity: sha512-0hJU9SCPvmMzIBdZFqNPXWa6dqh7WdH0cII9y+CyS8rG3nL48Bclra9HmKhVVUHyPWNH5Y7xDwAB7bfgSjkUMQ==}
     engines: {node: '>= 0.4'}
 
+  helmet@8.1.0:
+    resolution: {integrity: sha512-jOiHyAZsmnr8LqoPGmCjYAaiuWwjAPLgY8ZX2XrmHawt99/u1y6RgrZMTeoPfpUbV96HOalYgz1qzkRbw54Pmg==}
+    engines: {node: '>=18.0.0'}
+
   http-errors@2.0.0:
     resolution: {integrity: sha512-FtwrG/euBzaEjYeRqOgly7G0qviiXoJWnvEH2Z1plBdXgbyjv34pHTSb9zoeHMyDy33+DWy5Wt9Wo+TURtOYSQ==}
     engines: {node: '>= 0.8'}
@@ -679,6 +756,10 @@ packages:
   inherits@2.0.4:
     resolution: {integrity: sha512-k/vGaX4/Yla3WzyMCvTQOXYeIHvqOKtnqBduzTHpzpQZzAskKMhZ2K+EnBiSM9zGSoIFeMpXKxa4dYeZIQqewQ==}
 
+  ip-address@10.0.1:
+    resolution: {integrity: sha512-NWv9YLW4PoW2B7xtzaS3NCot75m6nK7Icdv0o3lfMceJVRfSoQwqD4wEH5rLwoKJwUiZ/rfpiVBhnaF0FK4HoA==}
+    engines: {node: '>= 12'}
+
   ipaddr.js@1.9.1:
     resolution: {integrity: sha512-0KI/607xoxSToH7GjN1FfSbLoU0+btTicjsQSWQlh/hZykN8KpmMf7uYwPW3R+akZ6R/w18ZlXSHBYXiYUPO3g==}
     engines: {node: '>= 0.10'}
@@ -736,6 +817,16 @@ packages:
   json-stable-stringify-without-jsonify@1.0.1:
     resolution: {integrity: sha512-Bdboy+l7tA3OGW6FjyFHWkP5LuByj1Tk33Ljyq0axyzdk9//JSi2u3fP1QSmd1KNwq6VOKYGlAu87CisVir6Pw==}
 
+  jsonwebtoken@9.0.2:
+    resolution: {integrity: sha512-PRp66vJ865SSqOlgqS8hujT5U4AOgMfhrwYIuIhfKaoSCZcirrmASQr8CX7cUg+RMih+hgznrjp99o+W4pJLHQ==}
+    engines: {node: '>=12', npm: '>=6'}
+
+  jwa@1.4.2:
+    resolution: {integrity: sha512-eeH5JO+21J78qMvTIDdBXidBd6nG2kZjg5Ohz/1fpa28Z4CcsWUzJ1ZZyFq/3z3N17aZy+ZuBoHljASbL1WfOw==}
+
+  jws@3.2.2:
+    resolution: {integrity: sha512-YHlZCB6lMTllWDtSPHz/ZXTsi8S00usEV6v1tjq8tOUZzw7DpSDWVXjXDre6ed1w/pd495ODpHZYSdkRTsa0HA==}
+
   kareem@2.6.3:
     resolution: {integrity: sha512-C3iHfuGUXK2u8/ipq9LfjFfXFxAZMQJJq7vLS45r3D9Y2xQ/m4S8zaR4zMLFWh9AsNPXmcFfUDhTEO8UIC/V6Q==}
     engines: {node: '>=12.0.0'}
@@ -743,6 +834,10 @@ packages:
   keyv@4.5.4:
     resolution: {integrity: sha512-oxVHkHR/EJf2CNXnWxRLW6mg7JyCCUcG0DtEGmL2ctUo1PNTin1PUil+r/+4r5MpVgC/fn1kjsx7mjSujKqIpw==}
 
+  ldapts@8.0.9:
+    resolution: {integrity: sha512-6UwfVFUX0Yp5XFY8ST0p9sytpmHGNm32GehI/dq4HuA3pL5kh0AceHBSfowv+cutIJFQnfBZmBo/6cnj87JDqA==}
+    engines: {node: '>=20'}
+
   levn@0.4.1:
     resolution: {integrity: sha512-+bT2uH4E5LGE7h/n3evcS/sQlJXCpIp6ym8OWJ5eV6+67Dsql/LaaT7qJBAt2rzfoa/5QBGBhxDix1dMt2kQKQ==}
     engines: {node: '>= 0.8.0'}
@@ -754,9 +849,30 @@ packages:
     resolution: {integrity: sha512-iPZK6eYjbxRu3uB4/WZ3EsEIMJFMqAoopl3R+zuq0UjcAm/MO6KCweDgPfP3elTztoKP3KtnVHxTn2NHBSDVUw==}
     engines: {node: '>=10'}
 
+  lodash.includes@4.3.0:
+    resolution: {integrity: sha512-W3Bx6mdkRTGtlJISOvVD/lbqjTlPPUDTMnlXZFnVwi9NKJ6tiAk6LVdlhZMm17VZisqhKcgzpO5Wz91PCt5b0w==}
+
+  lodash.isboolean@3.0.3:
+    resolution: {integrity: sha512-Bz5mupy2SVbPHURB98VAcw+aHh4vRV5IPNhILUCsOzRmsTmSQ17jIuqopAentWoehktxGd9e/hbIXq980/1QJg==}
+
+  lodash.isinteger@4.0.4:
+    resolution: {integrity: sha512-DBwtEWN2caHQ9/imiNeEA5ys1JoRtRfY3d7V9wkqtbycnAmTvRRmbHKDV4a0EYc678/dia0jrte4tjYwVBaZUA==}
+
+  lodash.isnumber@3.0.3:
+    resolution: {integrity: sha512-QYqzpfwO3/CWf3XP+Z+tkQsfaLL/EnUlXWVkIk5FUPc4sBdTehEqZONuyRt2P67PXAk+NXmTBcc97zw9t1FQrw==}
+
+  lodash.isplainobject@4.0.6:
+    resolution: {integrity: sha512-oSXzaWypCMHkPC3NvBEaPHf0KsA5mvPrOPgQWDsbg8n7orZ290M0BmC/jgRZ4vcJ6DTAhjrsSYgdsW/F+MFOBA==}
+
+  lodash.isstring@4.0.1:
+    resolution: {integrity: sha512-0wJxfxH1wgO3GrbuP+dTTk7op+6L41QCXbGINEmD+ny/G/eCqGzxyCsh7159S+mgDDcoarnBw6PC1PS5+wUGgw==}
+
   lodash.merge@4.6.2:
     resolution: {integrity: sha512-0KpjqXRVvrYyCsX1swR/XTK0va6VQkQM6MNo7PqW77ByjAhoARA8EfrP1N4+KlKj8YS0ZUCtRT/YUuhyYDujIQ==}
 
+  lodash.once@4.1.1:
+    resolution: {integrity: sha512-Sb487aTOCr9drQVL8pIxOzVhafOjZN9UU54hiN8PU3uAiSV7lx1yYNpbNmex2PK6dSJoNTSJUUswT651yww3Mg==}
+
   lru-cache@11.2.2:
     resolution: {integrity: sha512-F9ODfyqML2coTIsQpSkRHnLSZMtkU8Q+mSfcaIyKwy58u+8k5nvAYeiNhsyMARvzNcXJ9QfWVrcPsC9e9rAxtg==}
     engines: {node: 20 || >=22}
@@ -1111,6 +1227,9 @@ packages:
     resolution: {integrity: sha512-RwNA9Z/7PrK06rYLIzFMlaF+l73iwpzsqRIFgbMLbTcLD6cOao82TaWefPXQvB2fOC4AjuYSEndS7N/mTCbkdQ==}
     engines: {node: '>= 0.8'}
 
+  strict-event-emitter-types@2.0.0:
+    resolution: {integrity: sha512-Nk/brWYpD85WlOgzw5h173aci0Teyv8YdIAEtV+N88nDB0dLlazZyJMIsN6eo1/AR61l+p6CJTG1JIyFaoNEEA==}
+
   string-width@4.2.3:
     resolution: {integrity: sha512-wKyQRQpjJ0sIp62ErSZdGsjMJWsap5oRNihHhu6G7JVO/9jIB6UyevL+tXuOqrng8j/cxKTWyWUwvSTriiZz/g==}
     engines: {node: '>=8'}
@@ -1202,6 +1321,10 @@ packages:
   uri-js@4.4.1:
     resolution: {integrity: sha512-7rKUyy33Q1yc98pQ1DAmLtwX109F7TIfWlW1Ydo8Wl1ii1SeHieeh0HHfPeL2fMXK6z0s8ecKs9frCuLJvndBg==}
 
+  uuid@11.1.0:
+    resolution: {integrity: sha512-0/A9rDy9P7cJ+8w1c9WD9V//9Wj15Ce2MPz8Ri6032usz+NfePxx5AcN3bN+r6ZL6jEo066/yNYB3tn4pQEx+A==}
+    hasBin: true
+
   v8-compile-cache-lib@3.0.1:
     resolution: {integrity: sha512-wa7YjyUGfNZngI/vtK0UHAN+lgDCxBPCylVXGp0zu59Fz5aiGtNXaq3DhIov063MorB+VfufLh3JlF2KdTK3xg==}
 
@@ -1397,6 +1520,10 @@ snapshots:
 
   '@tsconfig/node16@1.0.4': {}
 
+  '@types/asn1@0.2.4':
+    dependencies:
+      '@types/node': 24.7.2
+
   '@types/body-parser@1.19.6':
     dependencies:
       '@types/connect': 3.4.38
@@ -1406,6 +1533,10 @@ snapshots:
     dependencies:
       '@types/node': 24.7.2
 
+  '@types/cookie-parser@1.4.9(@types/express@5.0.3)':
+    dependencies:
+      '@types/express': 5.0.3
+
   '@types/cors@2.8.19':
     dependencies:
       '@types/node': 24.7.2
@@ -1429,8 +1560,15 @@ snapshots:
 
   '@types/json-schema@7.0.15': {}
 
+  '@types/jsonwebtoken@9.0.10':
+    dependencies:
+      '@types/ms': 2.1.0
+      '@types/node': 24.7.2
+
   '@types/mime@1.3.5': {}
 
+  '@types/ms@2.1.0': {}
+
   '@types/node@24.7.2':
     dependencies:
       undici-types: 7.14.0
@@ -1514,6 +1652,10 @@ snapshots:
 
   argparse@2.0.1: {}
 
+  asn1@0.2.6:
+    dependencies:
+      safer-buffer: 2.1.2
+
   atomic-sleep@1.0.0: {}
 
   avvio@9.1.0:
@@ -1550,6 +1692,8 @@ snapshots:
 
   bson@6.10.4: {}
 
+  buffer-equal-constant-time@1.0.1: {}
+
   bytes@3.1.2: {}
 
   call-bind-apply-helpers@1.0.2:
@@ -1599,6 +1743,13 @@ snapshots:
 
   content-type@1.0.5: {}
 
+  cookie-parser@1.4.7:
+    dependencies:
+      cookie: 0.7.2
+      cookie-signature: 1.0.6
+
+  cookie-signature@1.0.6: {}
+
   cookie-signature@1.2.2: {}
 
   cookie@0.7.2: {}
@@ -1620,6 +1771,10 @@ snapshots:
 
   data-uri-to-buffer@4.0.1: {}
 
+  debug@4.4.1:
+    dependencies:
+      ms: 2.1.3
+
   debug@4.4.3(supports-color@5.5.0):
     dependencies:
       ms: 2.1.3
@@ -1634,6 +1789,8 @@ snapshots:
 
   diff@4.0.2: {}
 
+  dotenv@17.2.3: {}
+
   dunder-proto@1.0.1:
     dependencies:
       call-bind-apply-helpers: 1.0.2
@@ -1642,6 +1799,10 @@ snapshots:
 
   eastasianwidth@0.2.0: {}
 
+  ecdsa-sig-formatter@1.0.11:
+    dependencies:
+      safe-buffer: 5.2.1
+
   ee-first@1.1.1: {}
 
   emoji-regex@8.0.0: {}
@@ -1731,6 +1892,11 @@ snapshots:
 
   etag@1.8.1: {}
 
+  express-rate-limit@8.1.0(express@5.1.0):
+    dependencies:
+      express: 5.1.0
+      ip-address: 10.0.1
+
   express@5.1.0:
     dependencies:
       accepts: 2.0.0
@@ -1919,6 +2085,8 @@ snapshots:
     dependencies:
       function-bind: 1.1.2
 
+  helmet@8.1.0: {}
+
   http-errors@2.0.0:
     dependencies:
       depd: 2.0.0
@@ -1948,6 +2116,8 @@ snapshots:
 
   inherits@2.0.4: {}
 
+  ip-address@10.0.1: {}
+
   ipaddr.js@1.9.1: {}
 
   ipaddr.js@2.2.0: {}
@@ -1990,12 +2160,47 @@ snapshots:
 
   json-stable-stringify-without-jsonify@1.0.1: {}
 
+  jsonwebtoken@9.0.2:
+    dependencies:
+      jws: 3.2.2
+      lodash.includes: 4.3.0
+      lodash.isboolean: 3.0.3
+      lodash.isinteger: 4.0.4
+      lodash.isnumber: 3.0.3
+      lodash.isplainobject: 4.0.6
+      lodash.isstring: 4.0.1
+      lodash.once: 4.1.1
+      ms: 2.1.3
+      semver: 7.7.3
+
+  jwa@1.4.2:
+    dependencies:
+      buffer-equal-constant-time: 1.0.1
+      ecdsa-sig-formatter: 1.0.11
+      safe-buffer: 5.2.1
+
+  jws@3.2.2:
+    dependencies:
+      jwa: 1.4.2
+      safe-buffer: 5.2.1
+
   kareem@2.6.3: {}
 
   keyv@4.5.4:
     dependencies:
       json-buffer: 3.0.1
 
+  ldapts@8.0.9:
+    dependencies:
+      '@types/asn1': 0.2.4
+      asn1: 0.2.6
+      debug: 4.4.1
+      strict-event-emitter-types: 2.0.0
+      uuid: 11.1.0
+      whatwg-url: 14.2.0
+    transitivePeerDependencies:
+      - supports-color
+
   levn@0.4.1:
     dependencies:
       prelude-ls: 1.2.1
@@ -2011,8 +2216,22 @@ snapshots:
     dependencies:
       p-locate: 5.0.0
 
+  lodash.includes@4.3.0: {}
+
+  lodash.isboolean@3.0.3: {}
+
+  lodash.isinteger@4.0.4: {}
+
+  lodash.isnumber@3.0.3: {}
+
+  lodash.isplainobject@4.0.6: {}
+
+  lodash.isstring@4.0.1: {}
+
   lodash.merge@4.6.2: {}
 
+  lodash.once@4.1.1: {}
+
   lru-cache@11.2.2: {}
 
   make-error@1.3.6: {}
@@ -2345,6 +2564,8 @@ snapshots:
 
   statuses@2.0.1: {}
 
+  strict-event-emitter-types@2.0.0: {}
+
   string-width@4.2.3:
     dependencies:
       emoji-regex: 8.0.0
@@ -2433,6 +2654,8 @@ snapshots:
     dependencies:
       punycode: 2.3.1
 
+  uuid@11.1.0: {}
+
   v8-compile-cache-lib@3.0.1: {}
 
   vary@1.1.2: {}
diff --git a/server/src/api/v1/auth/index.ts b/server/src/api/v1/auth/index.ts
new file mode 100644
index 0000000..31716c6
--- /dev/null
+++ b/server/src/api/v1/auth/index.ts
@@ -0,0 +1,117 @@
+import express, { type Router, type Request, type Response } from 'express'
+import jwt from 'jsonwebtoken'
+
+import { UserModel } from '../../../models/user.model.ts'
+
+import ldapAuth from './ldap.ts'
+
+const router = express.Router()
+
+const ACCESS_TOKEN_SECRET = process.env.ACCESS_TOKEN_SECRET!
+const REFRESH_TOKEN_SECRET = process.env.REFRESH_TOKEN_SECRET!
+
+function createAccessToken(user: any) {
+	return jwt.sign(
+		{ sub: user._id, role: user.role },
+		ACCESS_TOKEN_SECRET,
+		{ expiresIn: '15m' },
+	)
+}
+
+function createRefreshToken(user: any) {
+	return jwt.sign(
+		{ sub: user._id },
+		REFRESH_TOKEN_SECRET,
+		{ expiresIn: '7d' },
+	)
+}
+
+router.post('/login', async (req: Request, res: Response) => {
+	const { email, username, password } = req.body
+	if (!username || !password) return res.status(400).json({ error: 'Missing credentials' })
+
+	try {
+		const ldapUser = await ldapAuth({ username, password })
+
+		if (!ldapUser.auth) return res.status(401).json({ error: 'Invalid credentials' })
+
+		let user = await UserModel.findOne({ username: ldapUser.user.cn })
+		if (!user) {
+			user = await UserModel.create({
+				username: ldapUser.user.cn,
+				email: ldapUser.user.dn,
+				refresh_token: '',
+			})
+		}
+
+		const accessToken = createAccessToken(user)
+		const refreshToken = createRefreshToken(user)
+
+		user.refreshToken = refreshToken
+		await user.save()
+
+		res.cookie('access_token', accessToken, {
+			httpOnly: true, sameSite: 'lax', secure: process.env.NODE_ENV !== 'dev', maxAge: 15 * 60 * 1000,
+		})
+		res.cookie('refresh_token', refreshToken, {
+			httpOnly: true, sameSite: 'lax', secure: process.env.NODE_ENV !== 'dev', maxAge: 7 * 24 * 3600 * 1000,
+		})
+
+		res.json({
+			ok: true,
+			user: {
+				username: ldapUser.user.cn,
+				email: ldapUser.user.dn
+			},
+		})
+
+	} catch (err) {
+		console.error(err)
+		res.status(401).json({ error: 'Invalid credentials' })
+	}
+})
+
+router.post('/refresh', async (req: Request, res: Response) => {
+	const token = req.cookies.refresh_token
+	if (!token) return res.status(401).json({ error: 'No refresh token' })
+	try {
+		const payload = jwt.verify(token, REFRESH_TOKEN_SECRET)
+		const user = await UserModel.findById(payload.sub)
+		if (!user || !user.refreshToken === token) return res.status(403).json({ error: 'Invalid refresh token' })
+
+		const newAccessToken = createAccessToken(user)
+		const newRefreshToken = createRefreshToken(user)
+
+		user.refreshToken = newRefreshToken
+		await user.save()
+
+		res.cookie('access_token', newAccessToken, {
+			httpOnly: true, sameSite: 'lax', secure: process.env.NODE_ENV !== 'dev', maxAge: 15 * 60 * 1000,
+		})
+		res.cookie('refresh_token', newRefreshToken, {
+			httpOnly: true, sameSite: 'lax', secure: process.env.NODE_ENV !== 'dev', maxAge: 7 * 24 * 3600 * 1000,
+		})
+		res.json({ ok: true })
+	} catch (error) {
+		res.status(401).json({ error: 'Invalid refresh token' })
+	}
+})
+
+router.post('/logout', async (req: Request, res: Response) => {
+	const token = req.cookies.refresh_token
+	if (token) {
+		try {
+			const payload = jwt.verify(token, REFRESH_TOKEN_SECRET)
+			const user = await UserModel.findById(payload.sub)
+			if (user) {
+				user.refreshToken = ''
+				await user.save()
+			}
+		} catch { }
+	}
+	res.clearCookie('access_token')
+	res.clearCookie('refresh_token')
+	res.json({ loggedOut: true })
+})
+
+export default router as Router
diff --git a/server/src/api/v1/auth/ldap.ts b/server/src/api/v1/auth/ldap.ts
new file mode 100644
index 0000000..12bd188
--- /dev/null
+++ b/server/src/api/v1/auth/ldap.ts
@@ -0,0 +1,31 @@
+
+import { Client } from 'ldapts'
+
+const LDAP_URL = 'ldap://192.168.0.26:389';
+const BASE_DN = 'DC=ldap,DC=goauthentik,DC=io';
+
+async function ldapAuth(userOptions: any) {
+	const { username, password } = userOptions;
+	if (!username || !password) return { auth: false }
+
+	const client = new Client({ url: LDAP_URL });
+
+	try {
+		const userDN = `cn=${username},ou=users,${BASE_DN}`;
+		await client.bind(userDN, password);
+
+		const { searchEntries } = await client.search(BASE_DN, {
+			scope: 'sub',
+			filter: `(cn=${username})`,
+			attributes: ['cn', 'mail'],
+		});
+
+		return { auth: true, user: searchEntries[0] }
+	} catch (err) {
+		return { auth: false }
+	} finally {
+		await client.unbind().catch(() => { })
+	}
+}
+
+export default ldapAuth
diff --git a/server/src/api/v1/key/index.ts b/server/src/api/v1/key/index.ts
index f937806..61c4bb3 100644
--- a/server/src/api/v1/key/index.ts
+++ b/server/src/api/v1/key/index.ts
@@ -1,12 +1,15 @@
-import express, { type Router, type Request, type Response } from 'express'
+import express, { type Router, type Response } from 'express'
 import { ApiKeyModel } from '../../../models/apikey.model.ts'
+import { verifyAccessToken, type AuthRequest } from '../../../middleware/auth.ts'
 
 const router = express.Router()
 
+router.use(verifyAccessToken)
 
-router.get('/', async (_req: Request, res: Response) => {
+router.get('/', verifyAccessToken, async (req: AuthRequest, res: Response) => {
 	try {
-		const doc = await ApiKeyModel.findOne({})
+		const userId = req.userId
+		const doc = await ApiKeyModel.findOne({ userId: userId })
 
 		const apiKey = doc?.apiKey || ''
 
@@ -17,17 +20,19 @@ router.get('/', async (_req: Request, res: Response) => {
 	}
 })
 
-router.post('/', async (req: Request, res: Response) => {
+router.post('/', verifyAccessToken, async (req: AuthRequest, res: Response) => {
 	try {
-		const { apiKey } = req.body as { apiKey?: string }
+		const { apiKey } = req.body
 		if (!apiKey || !apiKey.trim()) {
 			return res.status(400).json({ error: 'Invalid API key' })
 		}
+		console.log(req.body)
+		const userId = req.userId
 
 		await ApiKeyModel.updateOne(
 			{},
-			{ $set: { apiKey: apiKey } },
-			{ upsert: true }
+			{ $set: { userId: userId, apiKey: apiKey, lastUsed: new Date() } },
+			{ upsert: true },
 		)
 
 		res.json({ success: true })
@@ -37,9 +42,10 @@ router.post('/', async (req: Request, res: Response) => {
 	}
 })
 
-router.delete('/', async (_req: Request, res: Response) => {
+router.delete('/', verifyAccessToken, async (req: AuthRequest, res: Response) => {
 	try {
-		const result = await ApiKeyModel.deleteOne({})
+		const userId = req.userId
+		const result = await ApiKeyModel.deleteOne({ userId: userId })
 
 		if (result.deletedCount === 0) {
 			console.log('No API key found to delete.')
diff --git a/server/src/api/v1/subject/kanji.ts b/server/src/api/v1/subject/kanji.ts
index 72fd4ac..5636f05 100644
--- a/server/src/api/v1/subject/kanji.ts
+++ b/server/src/api/v1/subject/kanji.ts
@@ -7,7 +7,6 @@ const router = express.Router()
 router.get('/', async (_req: Request, res: Response) => {
 	try {
 		const doc = await KanjiModel.find()
-		console.log(doc)
 		res.json(doc)
 	} catch (error) {
 		console.error('Error fetching Kanji Subjects', error)
diff --git a/server/src/api/v1/user/index.ts b/server/src/api/v1/user/index.ts
new file mode 100644
index 0000000..3a5155f
--- /dev/null
+++ b/server/src/api/v1/user/index.ts
@@ -0,0 +1,22 @@
+import express, { type Router } from 'express'
+
+import { UserModel } from '../../../models/user.model.ts'
+import { verifyAccessToken, type AuthRequest } from '../../../middleware/auth.ts'
+
+const router = express.Router()
+
+router.get('/info', verifyAccessToken, async (req: AuthRequest, res) => {
+	try {
+		if (!req.userId) return res.status(401).json({ ok: false, message: 'Unauthorized' })
+
+		const user = await UserModel.findById(req.userId).select('-refreshToken -__v -createdAt -updatedAt')
+		if (!user) return res.status(404).json({ ok: false, message: 'User not found' })
+
+		return res.json({ ok: true, user })
+	} catch (err) {
+		console.error(err)
+		return res.status(500).json({ ok: false, message: 'Server error' })
+	}
+})
+
+export default router as Router
diff --git a/server/src/api/v1/wanikani/sync.ts b/server/src/api/v1/wanikani/sync.ts
index 0fac32d..acba6fc 100644
--- a/server/src/api/v1/wanikani/sync.ts
+++ b/server/src/api/v1/wanikani/sync.ts
@@ -1,26 +1,22 @@
-import express, { Router } from 'express'
+import express, { type Router, type Response } from 'express'
 
 import { ApiKeyModel } from '../../../models/apikey.model.ts'
-
 import { syncWanikaniData } from '../../../services/wanikaniService.ts'
+import { verifyAccessToken, type AuthRequest } from '../../../middleware/auth.ts'
 
 const router = express.Router()
 
-interface ApiKeyDocument {
-	apiKey?: string;
-}
-
-router.get('/sync', async (req, res) => {
+router.get('/sync', verifyAccessToken, async (req: AuthRequest, res: Response) => {
+	if (!req.userId) return res.status(401).json({ error: 'Unauthorized' })
 	try {
-		const apiKeyDoc = await ApiKeyModel.findOne() as ApiKeyDocument | null
+		const apiKeyDoc = await ApiKeyModel.findOne({ userId: req.userId })
 
 		const apiKey = apiKeyDoc?.apiKey
 
-		console.log(apiKey, apiKeyDoc)
 		if (!apiKey || apiKey.trim() === '') {
 			return res.status(401).json({ error: 'API Key not configured. Please sync your key first.' })
 		}
-		await syncWanikaniData(apiKey)
+		await syncWanikaniData(apiKey, req.userId)
 		res.json({ success: true })
 	} catch (err) {
 		console.error(err)
diff --git a/server/src/db/connect.ts b/server/src/db/connect.ts
index 9376c90..96eca08 100644
--- a/server/src/db/connect.ts
+++ b/server/src/db/connect.ts
@@ -1,7 +1,7 @@
 import mongoose from 'mongoose'
 
 export async function connectMongo() {
-	const url = process.env.NODE_ENV === 'DEV' ? 'mongodb://mongo-srs:27017/srs' : 'mongodb://192.168.0.26:27017/srs'
+	const url = process.env.NODE_ENV === 'DEV' ? 'mongodb://mongo:27017/srs' : 'mongodb://192.168.0.26:27017/srs'
 	if (mongoose.connection.readyState === 1) return
 	await mongoose.connect(url)
 	console.log('✅ Connected to MongoDB at', url)
diff --git a/server/src/index.ts b/server/src/index.ts
index d000fab..50b61c3 100644
--- a/server/src/index.ts
+++ b/server/src/index.ts
@@ -1,19 +1,68 @@
+import dotenv from 'dotenv'
+dotenv.config()
+
 import express from 'express'
-import { connectMongo } from './db/connect.ts'
 import cors from 'cors'
+import cookieParser from 'cookie-parser'
+import helmet from 'helmet'
+import rateLimit from 'express-rate-limit'
+
+import { connectMongo } from './db/connect.ts'
+
 import keyRouter from './api/v1/key/index.ts'
 import syncRouter from './api/v1/wanikani/sync.ts'
 import kanjiRouter from './api/v1/subject/kanji.ts'
 import vocabRouter from './api/v1/subject/vocab.ts'
+import authRouter from './api/v1/auth/index.ts'
+import userRoutes from './api/v1/user/index.ts'
+
+import { verifyAccessToken } from './middleware/auth.ts'
+
+const allowedOrigins = [
+	'http://localhost:5173',
+	'https://srs.crylia.de',
+]
 
 const app = express()
-app.use(cors())
+app.use(cors({
+	origin: (origin, callback) => {
+		if (!origin) return callback(null, true)
+		if (allowedOrigins.includes(origin)) return callback(null, true)
+		callback(new Error('Not allowed by CORS'))
+	},
+	credentials: true,
+}))
 app.use(express.json())
+app.use(cookieParser())
+if (process.env.NODE_ENV === 'production') {
+	app.use(
+		helmet({
+			contentSecurityPolicy: {
+				directives: {
+					defaultSrc: ["'self'"],
+					scriptSrc: ["'self'"],
+					connectSrc: ["'self'", "https://srs.crylia.de"],
+				},
+			},
+			crossOriginEmbedderPolicy: true,
+			crossOriginResourcePolicy: { policy: "same-origin" },
+		})
+	)
+} else {
+	app.use(
+		helmet({
+			contentSecurityPolicy: false,
+		})
+	)
+}
+app.use(rateLimit({ windowMs: 15 * 60 * 1000, max: 100 }))
 
-app.use('/api/v1/key', keyRouter)
-app.use('/api/v1/wanikani', syncRouter)
-app.use('/api/v1/subject/kanji', kanjiRouter)
-app.use('/api/v1/subject/vocab', vocabRouter)
+app.use('/api/v1/key', verifyAccessToken, keyRouter)
+app.use('/api/v1/subject/kanji', verifyAccessToken, kanjiRouter)
+app.use('/api/v1/subject/vocab', verifyAccessToken, vocabRouter)
+app.use('/api/v1/user', verifyAccessToken, userRoutes)
+app.use('/api/v1/wanikani', verifyAccessToken, syncRouter)
+app.use('/api/v1/auth', authRouter)
 
 const PORT = process.env.PORT || 3000
 connectMongo().then(() => {
diff --git a/server/src/middleware/auth.ts b/server/src/middleware/auth.ts
new file mode 100644
index 0000000..94847e8
--- /dev/null
+++ b/server/src/middleware/auth.ts
@@ -0,0 +1,21 @@
+import { type Request, type Response, type NextFunction } from 'express'
+import jwt from 'jsonwebtoken'
+
+export interface AuthRequest extends Request {
+	userId?: string
+}
+
+const ACCESS_TOKEN_SECRET = process.env.ACCESS_TOKEN_SECRET!
+
+export function verifyAccessToken(req: AuthRequest, res: Response, next: NextFunction) {
+	const token = req.cookies.access_token
+	if (!token) return res.status(401).json({ ok: false, message: 'No token provided' })
+
+	try {
+		const payload = jwt.verify(token, ACCESS_TOKEN_SECRET!)
+		req.userId = (payload as any).sub
+		next()
+	} catch {
+		return res.status(401).json({ ok: false, message: 'Invalid token' })
+	}
+}
diff --git a/server/src/models/apikey.model.ts b/server/src/models/apikey.model.ts
index 5ea3d1c..d9cd7c8 100644
--- a/server/src/models/apikey.model.ts
+++ b/server/src/models/apikey.model.ts
@@ -1,6 +1,7 @@
 import mongoose from 'mongoose'
 
 const ApiKeySchema = new mongoose.Schema({
+	userId: { type: String, required: true },
 	apiKey: { type: String, required: true },
 })
 
diff --git a/server/src/models/assignments.model.ts b/server/src/models/assignments.model.ts
index 9b6423e..d612e9c 100644
--- a/server/src/models/assignments.model.ts
+++ b/server/src/models/assignments.model.ts
@@ -1,6 +1,7 @@
 import mongoose from 'mongoose'
 
 const AssignmentSchema = new mongoose.Schema({
+	userId: { type: String, required: true },
 	subject_type: String,
 	subject_ids: [Number],
 })
diff --git a/server/src/models/kanji.model.ts b/server/src/models/kanji.model.ts
index 9e1433e..d4c1304 100644
--- a/server/src/models/kanji.model.ts
+++ b/server/src/models/kanji.model.ts
@@ -2,6 +2,7 @@ import mongoose from 'mongoose'
 import type { KanjiItem } from '../types/wanikani.ts'
 
 const KanjiSchema = new mongoose.Schema<KanjiItem>({
+	userId: { type: String, required: true },
 	characters: String,
 	meanings: Array,
 	readings: Array,
diff --git a/server/src/models/user.model.ts b/server/src/models/user.model.ts
new file mode 100644
index 0000000..f21955a
--- /dev/null
+++ b/server/src/models/user.model.ts
@@ -0,0 +1,9 @@
+import mongoose from "mongoose";
+
+const UserSchema = new mongoose.Schema({
+	username: { type: String, unique: true, required: true },
+	email: { type: String, unique: true },
+	refreshToken: String,
+}, { timestamps: true })
+
+export const UserModel = mongoose.model('User', UserSchema)
diff --git a/server/src/models/vocabulary.model.ts b/server/src/models/vocabulary.model.ts
index db35128..2171a26 100644
--- a/server/src/models/vocabulary.model.ts
+++ b/server/src/models/vocabulary.model.ts
@@ -2,6 +2,7 @@ import mongoose from 'mongoose'
 import type { VocabularyItem } from '../types/wanikani.ts'
 
 const VocabSchema = new mongoose.Schema<VocabularyItem>({
+	userId: { type: String, required: true },
 	characters: String,
 	meanings: Array,
 	readings: Array,
diff --git a/server/src/services/wanikaniService.ts b/server/src/services/wanikaniService.ts
index 6e3f8ef..b8a45ec 100644
--- a/server/src/services/wanikaniService.ts
+++ b/server/src/services/wanikaniService.ts
@@ -63,7 +63,8 @@ const fetchSubjects = async (
 	return results
 }
 
-const mapKanji = (item: WaniKaniSubject): KanjiItem => ({
+const mapKanji = (item: WaniKaniSubject, userId: string): KanjiItem => ({
+	userId: userId,
 	characters: item.data.characters,
 	meanings: item.data.meanings,
 	readings: item.data.readings,
@@ -73,7 +74,8 @@ const mapKanji = (item: WaniKaniSubject): KanjiItem => ({
 	srs_score: 0,
 })
 
-const mapVocab = (item: WaniKaniSubject): VocabularyItem => ({
+const mapVocab = (item: WaniKaniSubject, userId: string): VocabularyItem => ({
+	userId: userId,
 	characters: item.data.characters,
 	meanings: item.data.meanings,
 	readings: item.data.readings ?? [],
@@ -84,13 +86,13 @@ const mapVocab = (item: WaniKaniSubject): VocabularyItem => ({
 	srs_score: 0,
 })
 
-export const syncWanikaniData = async (apiKey: string): Promise<void> => {
+export const syncWanikaniData = async (apiKey: string, userId: string): Promise<void> => {
 	const headers = { Authorization: `Bearer ${apiKey}` }
 
 	try {
 		await ApiKeyModel.updateOne(
 			{},
-			{ $set: { value: apiKey, lastUsed: new Date() } },
+			{ $set: { user: userId, apiKey: apiKey, lastUsed: new Date() } },
 			{ upsert: true },
 		)
 
@@ -112,13 +114,13 @@ export const syncWanikaniData = async (apiKey: string): Promise<void> => {
 		}
 
 		await AssignmentModel.updateOne(
-			{ subject_type: 'kanji' },
+			{ userId: userId, subject_type: 'kanji' },
 			{ $set: { subject_ids: unlockedKanjiSubjectIds } },
 			{ upsert: true },
 		)
 
 		await AssignmentModel.updateOne(
-			{ subject_type: 'vocabulary' },
+			{ userId: userId, subject_type: 'vocabulary' },
 			{ $set: { subject_ids: unlockedVocabSubjectIds } },
 			{ upsert: true },
 		)
@@ -126,12 +128,12 @@ export const syncWanikaniData = async (apiKey: string): Promise<void> => {
 		const existingKanjiSlugs = new Set((await KanjiModel.find({}, { slug: 1 })).map(k => k.slug))
 		const kanjiSubjects = await fetchSubjects(unlockedKanjiSubjectIds, headers)
 		const newKanji = kanjiSubjects.filter(s => !existingKanjiSlugs.has(s.data.slug))
-		if (newKanji.length > 0) await KanjiModel.insertMany(newKanji.map(mapKanji))
+		if (newKanji.length > 0) await KanjiModel.insertMany(newKanji.map(k => mapKanji(k, userId)))
 
 		const existingVocabSlugs = new Set((await VocabularyModel.find({}, { slug: 1 })).map(v => v.slug))
 		const vocabSubjects = await fetchSubjects(unlockedVocabSubjectIds, headers)
 		const newVocab = vocabSubjects.filter(s => !existingVocabSlugs.has(s.data.slug))
-		if (newVocab.length > 0) await VocabularyModel.insertMany(newVocab.map(mapVocab))
+		if (newVocab.length > 0) await VocabularyModel.insertMany(newVocab.map(v => mapVocab(v, userId)))
 
 		console.log('✅ Sync complete')
 	} catch (err) {
diff --git a/server/src/types/wanikani.ts b/server/src/types/wanikani.ts
index c1bf22c..7f2d75d 100644
--- a/server/src/types/wanikani.ts
+++ b/server/src/types/wanikani.ts
@@ -1,4 +1,5 @@
 export interface KanjiItem {
+	userId: string
 	characters: string
 	meanings: {
 		meaning: string,
@@ -21,6 +22,7 @@ export interface KanjiItem {
 }
 
 export interface VocabularyItem {
+	userId: string
 	characters: string
 	meanings: {
 		meaning: string
@@ -51,6 +53,7 @@ export interface VocabularyItem {
 }
 
 export interface Assignment {
+	userId: string
 	unlocked_at?: Date
 	subject_ids: number[]
 	subject_type: string