diff --git a/src/common/types.ts b/src/common/types.ts
index 36ee22d2..e91e3687 100644
--- a/src/common/types.ts
+++ b/src/common/types.ts
@@ -1,3 +1,5 @@
+import { Event } from 'nostr-tools'
+
 export type TRelayGroup = {
   groupName: string
   relayUrls: string[]
@@ -11,3 +13,5 @@ export type TConfig = {
 
 export type TThemeSetting = 'light' | 'dark' | 'system'
 export type TTheme = 'light' | 'dark'
+
+export type TDraftEvent = Pick<Event, 'content' | 'created_at' | 'kind' | 'tags'>
diff --git a/src/main/index.ts b/src/main/index.ts
index 80febe94..600e66ad 100644
--- a/src/main/index.ts
+++ b/src/main/index.ts
@@ -1,10 +1,11 @@
 import { electronApp, is, optimizer } from '@electron-toolkit/utils'
-import { app, BrowserWindow, shell } from 'electron'
+import { app, BrowserWindow, ipcMain, safeStorage, shell } from 'electron'
 import { join } from 'path'
 import icon from '../../resources/icon.png?asset'
+import { NostrService } from './services/nostr.service'
+import { StorageService } from './services/storage.service'
 import { ThemeService } from './services/theme.service'
 import { TSendToRenderer } from './types'
-import { StorageService } from './services/storage.service'
 
 let mainWindow: BrowserWindow | null = null
 
@@ -73,6 +74,11 @@ app.whenReady().then(async () => {
   const themeService = new ThemeService(storageService, sendToRenderer)
   themeService.init()
 
+  const nostrService = new NostrService()
+  nostrService.init()
+
+  ipcMain.handle('system:isEncryptionAvailable', () => safeStorage.isEncryptionAvailable())
+
   createWindow()
 
   app.on('activate', function () {
diff --git a/src/main/services/nostr.service.ts b/src/main/services/nostr.service.ts
new file mode 100644
index 00000000..4702df33
--- /dev/null
+++ b/src/main/services/nostr.service.ts
@@ -0,0 +1,80 @@
+import { TDraftEvent } from '@common/types'
+import { bytesToHex, hexToBytes } from '@noble/hashes/utils'
+import { app, ipcMain, safeStorage } from 'electron'
+import { existsSync, readFileSync, rmSync, writeFileSync } from 'fs'
+import { Event, finalizeEvent, getPublicKey, nip19 } from 'nostr-tools'
+import { join } from 'path'
+
+export class NostrService {
+  private keyPath: string
+  private privkey: Uint8Array | null = null
+  private pubkey: string | null = null
+
+  constructor() {
+    this.keyPath = join(app.getPath('userData'), 'private-key')
+  }
+
+  init() {
+    if (existsSync(this.keyPath)) {
+      const data = readFileSync(this.keyPath)
+      const privateKey = safeStorage.decryptString(data)
+      this.privkey = hexToBytes(privateKey)
+      this.pubkey = getPublicKey(this.privkey)
+    }
+
+    ipcMain.handle('nostr:login', (_, nsec: string) => this.login(nsec))
+    ipcMain.handle('nostr:logout', () => this.logout())
+    ipcMain.handle('nostr:getPublicKey', () => this.pubkey)
+    ipcMain.handle('nostr:signEvent', (_, event: Omit<Event, 'id' | 'pubkey' | 'sig'>) =>
+      this.signEvent(event)
+    )
+  }
+
+  private async login(nsec: string): Promise<{
+    pubkey?: string
+    reason?: string
+  }> {
+    try {
+      const { type, data } = nip19.decode(nsec)
+      if (type !== 'nsec') {
+        return {
+          reason: 'invalid nsec'
+        }
+      }
+
+      this.privkey = data
+      const encryptedPrivateKey = safeStorage.encryptString(bytesToHex(data))
+      writeFileSync(this.keyPath, encryptedPrivateKey)
+
+      this.pubkey = getPublicKey(data)
+
+      return {
+        pubkey: this.pubkey
+      }
+    } catch (error) {
+      console.error(error)
+      return {
+        reason: error instanceof Error ? error.message : 'invalid nesc'
+      }
+    }
+  }
+
+  private logout() {
+    rmSync(this.keyPath)
+    this.privkey = null
+    this.pubkey = null
+  }
+
+  private signEvent(draftEvent: TDraftEvent) {
+    if (!this.privkey) {
+      return null
+    }
+
+    try {
+      return finalizeEvent(draftEvent, this.privkey)
+    } catch (error) {
+      console.error(error)
+      return null
+    }
+  }
+}
diff --git a/src/preload/index.d.ts b/src/preload/index.d.ts
index fc66a373..56a2751b 100644
--- a/src/preload/index.d.ts
+++ b/src/preload/index.d.ts
@@ -1,10 +1,14 @@
-import { TRelayGroup, TTheme, TThemeSetting } from '@common/types'
+import { TDraftEvent, TRelayGroup, TTheme, TThemeSetting } from '@common/types'
 import { ElectronAPI } from '@electron-toolkit/preload'
+import { Event } from 'nostr-tools'
 
 declare global {
   interface Window {
     electron: ElectronAPI
     api: {
+      system: {
+        isEncryptionAvailable: () => Promise<boolean>
+      }
       theme: {
         onChange: (cb: (theme: TTheme) => void) => void
         current: () => Promise<TTheme>
@@ -15,6 +19,15 @@ declare global {
         getRelayGroups: () => Promise<TRelayGroup[]>
         setRelayGroups: (relayGroups: TRelayGroup[]) => Promise<void>
       }
+      nostr: {
+        login: (nsec: string) => Promise<{
+          pubkey?: string
+          reason?: string
+        }>
+        logout: () => Promise<void>
+        getPublicKey: () => Promise<string | null>
+        signEvent: (draftEvent: TDraftEvent) => Promise<Event | null>
+      }
     }
   }
 }
diff --git a/src/preload/index.ts b/src/preload/index.ts
index a1d86a50..f03d9185 100644
--- a/src/preload/index.ts
+++ b/src/preload/index.ts
@@ -1,9 +1,12 @@
-import { TRelayGroup, TThemeSetting } from '@common/types'
+import { TDraftEvent, TRelayGroup, TThemeSetting } from '@common/types'
 import { electronAPI } from '@electron-toolkit/preload'
 import { contextBridge, ipcRenderer } from 'electron'
 
 // Custom APIs for renderer
 const api = {
+  system: {
+    isEncryptionAvailable: () => ipcRenderer.invoke('system:isEncryptionAvailable')
+  },
   theme: {
     onChange: (cb: (theme: 'dark' | 'light') => void) => {
       ipcRenderer.on('theme:change', (_, theme) => {
@@ -18,6 +21,12 @@ const api = {
     getRelayGroups: () => ipcRenderer.invoke('storage:getRelayGroups'),
     setRelayGroups: (relayGroups: TRelayGroup[]) =>
       ipcRenderer.invoke('storage:setRelayGroups', relayGroups)
+  },
+  nostr: {
+    login: (nsec: string) => ipcRenderer.invoke('nostr:login', nsec),
+    logout: () => ipcRenderer.invoke('nostr:logout'),
+    getPublicKey: () => ipcRenderer.invoke('nostr:getPublicKey'),
+    signEvent: (draftEvent: TDraftEvent) => ipcRenderer.invoke('nostr:signEvent', draftEvent)
   }
 }
 
diff --git a/src/renderer/src/App.tsx b/src/renderer/src/App.tsx
index be5e29f3..c93e3df4 100644
--- a/src/renderer/src/App.tsx
+++ b/src/renderer/src/App.tsx
@@ -8,6 +8,7 @@ import NoteListPage from './pages/primary/NoteListPage'
 import HashtagPage from './pages/secondary/HashtagPage'
 import NotePage from './pages/secondary/NotePage'
 import ProfilePage from './pages/secondary/ProfilePage'
+import { NostrProvider } from './providers/NostrProvider'
 import { RelaySettingsProvider } from './providers/RelaySettingsProvider'
 
 const routes = [
@@ -20,12 +21,14 @@ export default function App(): JSX.Element {
   return (
     <div className="h-screen">
       <ThemeProvider>
-        <RelaySettingsProvider>
-          <PageManager routes={routes}>
-            <NoteListPage />
-          </PageManager>
-          <Toaster />
-        </RelaySettingsProvider>
+        <NostrProvider>
+          <RelaySettingsProvider>
+            <PageManager routes={routes}>
+              <NoteListPage />
+            </PageManager>
+            <Toaster />
+          </RelaySettingsProvider>
+        </NostrProvider>
       </ThemeProvider>
     </div>
   )
diff --git a/src/renderer/src/components/Content/index.tsx b/src/renderer/src/components/Content/index.tsx
index 5aa9cf3d..5c423074 100644
--- a/src/renderer/src/components/Content/index.tsx
+++ b/src/renderer/src/components/Content/index.tsx
@@ -37,7 +37,7 @@ const Content = memo(
       nodes.push(
         <ImageGallery
           className="mt-2 w-fit"
-          key="images"
+          key={`image-gallery-${event.id}`}
           images={images}
           isNsfw={isNsfw}
           size={size}
@@ -51,7 +51,7 @@ const Content = memo(
         nodes.push(
           <VideoPlayer
             className="mt-2"
-            key={`video-${index}`}
+            key={`video-${index}-${src}`}
             src={src}
             isNsfw={isNsfw}
             size={size}
diff --git a/src/renderer/src/components/NoteList/index.tsx b/src/renderer/src/components/NoteList/index.tsx
index ae04aee4..d8351f8b 100644
--- a/src/renderer/src/components/NoteList/index.tsx
+++ b/src/renderer/src/components/NoteList/index.tsx
@@ -111,7 +111,9 @@ export default function NoteList({
     <>
       {newEvents.length > 0 && (
         <div className="flex justify-center w-full mb-4">
-          <Button onClick={showNewEvents}>show new notes</Button>
+          <Button size="lg" onClick={showNewEvents}>
+            show new notes
+          </Button>
         </div>
       )}
       <div className={cn('flex flex-col gap-4', className)}>
diff --git a/src/renderer/src/components/RelaySettings/RelayGroup.tsx b/src/renderer/src/components/RelaySettings/RelayGroup.tsx
index c9c74880..40f3143a 100644
--- a/src/renderer/src/components/RelaySettings/RelayGroup.tsx
+++ b/src/renderer/src/components/RelaySettings/RelayGroup.tsx
@@ -95,9 +95,9 @@ function RelayGroupName({ groupName }: { groupName: string }) {
         onChange={handleRenameInputChange}
         onBlur={saveNewGroupName}
         onKeyDown={handleRenameInputKeyDown}
-        className={`font-semibold w-24 h-8 ${newNameError ? 'border-destructive' : ''}`}
+        className={`font-semibold w-28 ${newNameError ? 'border-destructive' : ''}`}
       />
-      <Button variant="ghost" className="h-8 w-8" onClick={saveNewGroupName}>
+      <Button variant="ghost" size="icon" onClick={saveNewGroupName}>
         <Check size={18} className="text-green-500" />
       </Button>
       {newNameError && <div className="text-xs text-destructive">{newNameError}</div>}
@@ -145,11 +145,10 @@ function RelayGroupOptions({ groupName }: { groupName: string }) {
 
   return (
     <DropdownMenu>
-      <DropdownMenuTrigger>
-        <EllipsisVertical
-          size={16}
-          className="text-muted-foreground hover:text-accent-foreground cursor-pointer"
-        />
+      <DropdownMenuTrigger asChild>
+        <Button variant="ghost" size="icon">
+          <EllipsisVertical />
+        </Button>
       </DropdownMenuTrigger>
       <DropdownMenuContent>
         <DropdownMenuItem onClick={() => setRenamingGroup(groupName)}>Rename</DropdownMenuItem>
diff --git a/src/renderer/src/components/RelaySettings/RelayUrl.tsx b/src/renderer/src/components/RelaySettings/RelayUrl.tsx
index 2d936d8c..10787e1c 100644
--- a/src/renderer/src/components/RelaySettings/RelayUrl.tsx
+++ b/src/renderer/src/components/RelaySettings/RelayUrl.tsx
@@ -42,6 +42,7 @@ export default function RelayUrls({ groupName }: { groupName: string }) {
   }
 
   const saveNewRelayUrl = () => {
+    if (newRelayUrl === '') return
     const normalizedUrl = normalizeURL(newRelayUrl)
     if (relays.some(({ url }) => url === normalizedUrl)) {
       return setNewRelayUrlError('already exists')
@@ -82,16 +83,14 @@ export default function RelayUrls({ groupName }: { groupName: string }) {
       </div>
       <div className="mt-2 flex gap-2">
         <Input
-          className={`h-8 ${newRelayUrlError ? 'border-destructive' : ''}`}
+          className={newRelayUrlError ? 'border-destructive' : ''}
           placeholder="Add new relay URL"
           value={newRelayUrl}
           onKeyDown={handleRelayUrlInputKeyDown}
           onChange={handleRelayUrlInputChange}
           onBlur={saveNewRelayUrl}
         />
-        <Button className="h-8 w-12" onClick={saveNewRelayUrl}>
-          Add
-        </Button>
+        <Button onClick={saveNewRelayUrl}>Add</Button>
       </div>
       {newRelayUrlError && <div className="text-xs text-destructive mt-1">{newRelayUrlError}</div>}
     </>
diff --git a/src/renderer/src/components/RelaySettings/index.tsx b/src/renderer/src/components/RelaySettings/index.tsx
index 09f20e5d..f69600d7 100644
--- a/src/renderer/src/components/RelaySettings/index.tsx
+++ b/src/renderer/src/components/RelaySettings/index.tsx
@@ -56,14 +56,14 @@ export default function RelaySettings() {
             </div>
             <div className="mt-2 flex gap-2">
               <Input
-                className={`h-8 ${newNameError ? 'border-destructive' : ''}`}
+                className={newNameError ? 'border-destructive' : ''}
                 placeholder="Group name"
                 value={newGroupName}
                 onChange={handleNewGroupNameChange}
                 onKeyDown={handleNewGroupNameKeyDown}
                 onBlur={saveRelayGroup}
               />
-              <Button className="h-8 w-12">Add</Button>
+              <Button>Add</Button>
             </div>
             {newNameError && <div className="text-xs text-destructive mt-1">{newNameError}</div>}
           </div>
diff --git a/src/renderer/src/components/Titlebar/index.tsx b/src/renderer/src/components/Titlebar/index.tsx
index 2c8a8603..b28f95f3 100644
--- a/src/renderer/src/components/Titlebar/index.tsx
+++ b/src/renderer/src/components/Titlebar/index.tsx
@@ -1,4 +1,3 @@
-import { Button } from '@renderer/components/ui/button'
 import { cn } from '@renderer/lib/utils'
 
 export function Titlebar({
@@ -19,28 +18,3 @@ export function Titlebar({
     </div>
   )
 }
-
-export function TitlebarButton({
-  onClick,
-  disabled,
-  children,
-  title
-}: {
-  onClick?: () => void
-  disabled?: boolean
-  children: React.ReactNode
-  title?: string
-}) {
-  return (
-    <Button
-      className="non-draggable"
-      variant="ghost"
-      size="xs"
-      onClick={onClick}
-      disabled={disabled}
-      title={title}
-    >
-      {children}
-    </Button>
-  )
-}
diff --git a/src/renderer/src/components/ui/button.tsx b/src/renderer/src/components/ui/button.tsx
index a1cfe035..84552285 100644
--- a/src/renderer/src/components/ui/button.tsx
+++ b/src/renderer/src/components/ui/button.tsx
@@ -14,15 +14,16 @@ const buttonVariants = cva(
         outline: 'border border-input bg-background hover:bg-accent hover:text-accent-foreground',
         secondary: 'bg-secondary text-secondary-foreground hover:bg-muted/80',
         'secondary-2': 'bg-secondary text-secondary-foreground hover:bg-highlight',
-        ghost: 'hover:bg-accent hover:text-accent-foreground',
-        link: 'text-primary underline-offset-4 hover:underline'
+        ghost: 'text-muted-foreground hover:bg-accent hover:text-foreground',
+        link: 'text-primary underline-offset-4 hover:underline',
+        titlebar: 'non-draggable hover:bg-accent hover:text-accent-foreground'
       },
       size: {
-        default: 'h-10 px-4 py-2',
-        sm: 'h-9 rounded-md px-3',
-        lg: 'h-11 rounded-md px-8',
-        icon: 'h-10 w-10',
-        xs: 'h-7 w-7 p-0 rounded-full'
+        default: 'h-8 rounded-md px-2',
+        sm: 'h-8 rounded-md px-2',
+        lg: 'h-10 px-4 py-2',
+        icon: 'h-8 w-8 rounded-full',
+        titlebar: 'h-7 w-7 rounded-full'
       }
     },
     defaultVariants: {
diff --git a/src/renderer/src/components/ui/input.tsx b/src/renderer/src/components/ui/input.tsx
index 5e3cf657..17bc6200 100644
--- a/src/renderer/src/components/ui/input.tsx
+++ b/src/renderer/src/components/ui/input.tsx
@@ -10,7 +10,7 @@ const Input = React.forwardRef<HTMLInputElement, InputProps>(
       <input
         type={type}
         className={cn(
-          'flex h-10 w-full rounded-md border border-input bg-background px-3 py-2 text-sm ring-offset-background file:border-0 file:bg-transparent file:text-sm file:font-medium file:text-foreground placeholder:text-muted-foreground focus-visible:outline-none focus-visible:ring-2 focus-visible:ring-ring focus-visible:ring-offset-2 disabled:cursor-not-allowed disabled:opacity-50',
+          'flex h-8 w-full rounded-md border border-input bg-background px-3 py-2 text-sm ring-offset-background file:border-0 file:bg-transparent file:text-sm file:font-medium file:text-foreground placeholder:text-muted-foreground focus-visible:outline-none focus-visible:ring-2 focus-visible:ring-ring focus-visible:ring-offset-1 disabled:cursor-not-allowed disabled:opacity-50',
           className
         )}
         ref={ref}
diff --git a/src/renderer/src/embedded/EmbeddedHashtag.tsx b/src/renderer/src/embedded/EmbeddedHashtag.tsx
index 856211c9..78f8fb05 100644
--- a/src/renderer/src/embedded/EmbeddedHashtag.tsx
+++ b/src/renderer/src/embedded/EmbeddedHashtag.tsx
@@ -4,6 +4,6 @@ import { TEmbeddedRenderer } from './types'
 export const embeddedHashtagRenderer: TEmbeddedRenderer = {
   regex: /#([^\s#]+)/g,
   render: (hashtag: string, index: number) => {
-    return <EmbeddedHashtag key={`hashtag-${index}`} hashtag={hashtag} />
+    return <EmbeddedHashtag key={`hashtag-${index}-${hashtag}`} hashtag={hashtag} />
   }
 }
diff --git a/src/renderer/src/embedded/EmbeddedNormalUrl.tsx b/src/renderer/src/embedded/EmbeddedNormalUrl.tsx
index 385d0793..4bbd86d3 100644
--- a/src/renderer/src/embedded/EmbeddedNormalUrl.tsx
+++ b/src/renderer/src/embedded/EmbeddedNormalUrl.tsx
@@ -4,6 +4,6 @@ import { TEmbeddedRenderer } from './types'
 export const embeddedNormalUrlRenderer: TEmbeddedRenderer = {
   regex: /(https?:\/\/[^\s]+|wss?:\/\/[^\s]+)/g,
   render: (url: string, index: number) => {
-    return <EmbeddedNormalUrl key={`normal-url-${index}`} url={url} />
+    return <EmbeddedNormalUrl key={`normal-url-${index}-${url}`} url={url} />
   }
 }
diff --git a/src/renderer/src/embedded/EmbeddedNostrNpub.tsx b/src/renderer/src/embedded/EmbeddedNostrNpub.tsx
index 52eca7fe..a9bf7476 100644
--- a/src/renderer/src/embedded/EmbeddedNostrNpub.tsx
+++ b/src/renderer/src/embedded/EmbeddedNostrNpub.tsx
@@ -5,6 +5,6 @@ export const embeddedNostrNpubRenderer: TEmbeddedRenderer = {
   regex: /(nostr:npub1[a-z0-9]{58})/g,
   render: (id: string, index: number) => {
     const npub1 = id.split(':')[1]
-    return <EmbeddedMention key={`embedded-nostr-npub-${index}`} userId={npub1} />
+    return <EmbeddedMention key={`embedded-nostr-npub-${index}-${npub1}`} userId={npub1} />
   }
 }
diff --git a/src/renderer/src/embedded/EmbeddedNostrProfile.tsx b/src/renderer/src/embedded/EmbeddedNostrProfile.tsx
index 7bd01d4d..b7bcc4b7 100644
--- a/src/renderer/src/embedded/EmbeddedNostrProfile.tsx
+++ b/src/renderer/src/embedded/EmbeddedNostrProfile.tsx
@@ -5,6 +5,6 @@ export const embeddedNostrProfileRenderer: TEmbeddedRenderer = {
   regex: /(nostr:nprofile1[a-z0-9]+)/g,
   render: (id: string, index: number) => {
     const nprofile = id.split(':')[1]
-    return <EmbeddedMention key={`embedded-nostr-profile-${index}`} userId={nprofile} />
+    return <EmbeddedMention key={`embedded-nostr-profile-${index}-${nprofile}`} userId={nprofile} />
   }
 }
diff --git a/src/renderer/src/embedded/EmbeddedNpub.tsx b/src/renderer/src/embedded/EmbeddedNpub.tsx
index f989047b..99e021f8 100644
--- a/src/renderer/src/embedded/EmbeddedNpub.tsx
+++ b/src/renderer/src/embedded/EmbeddedNpub.tsx
@@ -4,6 +4,6 @@ import { TEmbeddedRenderer } from './types'
 export const embeddedNpubRenderer: TEmbeddedRenderer = {
   regex: /(npub1[a-z0-9]{58})/g,
   render: (npub1: string, index: number) => {
-    return <EmbeddedMention key={`embedded-npub-${index}`} userId={npub1} />
+    return <EmbeddedMention key={`embedded-npub-${index}-${npub1}`} userId={npub1} />
   }
 }
diff --git a/src/renderer/src/layouts/PrimaryPageLayout/AccountButton.tsx b/src/renderer/src/layouts/PrimaryPageLayout/AccountButton.tsx
new file mode 100644
index 00000000..b600b216
--- /dev/null
+++ b/src/renderer/src/layouts/PrimaryPageLayout/AccountButton.tsx
@@ -0,0 +1,115 @@
+import { Avatar, AvatarFallback, AvatarImage } from '@renderer/components/ui/avatar'
+import { Button } from '@renderer/components/ui/button'
+import {
+  Dialog,
+  DialogContent,
+  DialogDescription,
+  DialogHeader,
+  DialogTitle,
+  DialogTrigger
+} from '@renderer/components/ui/dialog'
+import {
+  DropdownMenu,
+  DropdownMenuContent,
+  DropdownMenuItem,
+  DropdownMenuTrigger
+} from '@renderer/components/ui/dropdown-menu'
+import { Input } from '@renderer/components/ui/input'
+import { useFetchProfile } from '@renderer/hooks'
+import { generateImageByPubkey } from '@renderer/lib/pubkey'
+import { toProfile } from '@renderer/lib/url'
+import { useSecondaryPage } from '@renderer/PageManager'
+import { useNostr } from '@renderer/providers/NostrProvider'
+import { LogIn } from 'lucide-react'
+import { useState } from 'react'
+
+export default function AccountButton() {
+  const { pubkey } = useNostr()
+
+  if (pubkey) {
+    return <ProfileButton pubkey={pubkey} />
+  } else {
+    return <LoginButton />
+  }
+}
+
+function ProfileButton({ pubkey }: { pubkey: string }) {
+  const { logout } = useNostr()
+  const { avatar } = useFetchProfile(pubkey)
+  const { push } = useSecondaryPage()
+  const defaultAvatar = generateImageByPubkey(pubkey)
+
+  return (
+    <DropdownMenu>
+      <DropdownMenuTrigger className="relative non-draggable">
+        <Avatar className="w-6 h-6">
+          <AvatarImage src={avatar} />
+          <AvatarFallback>
+            <img src={defaultAvatar} />
+          </AvatarFallback>
+        </Avatar>
+        <div className="absolute inset-0 hover:bg-black opacity-0 hover:opacity-20 transition-opacity rounded-full" />
+      </DropdownMenuTrigger>
+      <DropdownMenuContent>
+        <DropdownMenuItem onClick={() => push(toProfile(pubkey))}>Profile</DropdownMenuItem>
+        <DropdownMenuItem className="text-destructive focus:text-destructive" onClick={logout}>
+          Logout
+        </DropdownMenuItem>
+      </DropdownMenuContent>
+    </DropdownMenu>
+  )
+}
+
+function LoginButton() {
+  const { canLogin, login } = useNostr()
+  const [open, setOpen] = useState(false)
+  const [nsec, setNsec] = useState('')
+  const [errMsg, setErrMsg] = useState<string | null>(null)
+
+  const handleInputChange = (e: React.ChangeEvent<HTMLInputElement>) => {
+    setNsec(e.target.value)
+    setErrMsg(null)
+  }
+
+  const handleLogin = () => {
+    if (nsec === '') return
+
+    login(nsec).catch((err) => {
+      setErrMsg(err.message)
+    })
+  }
+
+  return (
+    <Dialog open={open} onOpenChange={setOpen}>
+      <DialogTrigger>
+        <Button variant="titlebar" size="titlebar">
+          <LogIn />
+        </Button>
+      </DialogTrigger>
+      <DialogContent className="w-80">
+        <DialogHeader>
+          <DialogTitle>Sign in</DialogTitle>
+          {!canLogin && (
+            <DialogDescription className="text-destructive">
+              Encryption is not available in your device.
+            </DialogDescription>
+          )}
+        </DialogHeader>
+        <div className="space-y-1">
+          <Input
+            type="password"
+            placeholder="nsec1.."
+            value={nsec}
+            onChange={handleInputChange}
+            className={errMsg ? 'border-destructive' : ''}
+            disabled={!canLogin}
+          />
+          {errMsg && <div className="text-xs text-destructive pl-3">{errMsg}</div>}
+        </div>
+        <Button onClick={handleLogin} disabled={!canLogin}>
+          Login
+        </Button>
+      </DialogContent>
+    </Dialog>
+  )
+}
diff --git a/src/renderer/src/layouts/PrimaryPageLayout/RefreshButton.tsx b/src/renderer/src/layouts/PrimaryPageLayout/RefreshButton.tsx
index 5791f8c2..584e9182 100644
--- a/src/renderer/src/layouts/PrimaryPageLayout/RefreshButton.tsx
+++ b/src/renderer/src/layouts/PrimaryPageLayout/RefreshButton.tsx
@@ -1,12 +1,12 @@
-import { TitlebarButton } from '@renderer/components/Titlebar'
+import { Button } from '@renderer/components/ui/button'
 import { usePrimaryPage } from '@renderer/PageManager'
 import { RefreshCcw } from 'lucide-react'
 
 export default function RefreshButton() {
   const { refresh } = usePrimaryPage()
   return (
-    <TitlebarButton onClick={refresh} title="reload">
+    <Button variant="titlebar" size="titlebar" onClick={refresh} title="reload">
       <RefreshCcw />
-    </TitlebarButton>
+    </Button>
   )
 }
diff --git a/src/renderer/src/layouts/PrimaryPageLayout/RelaySettingsPopover.tsx b/src/renderer/src/layouts/PrimaryPageLayout/RelaySettingsPopover.tsx
index 822438ff..be4c8692 100644
--- a/src/renderer/src/layouts/PrimaryPageLayout/RelaySettingsPopover.tsx
+++ b/src/renderer/src/layouts/PrimaryPageLayout/RelaySettingsPopover.tsx
@@ -1,4 +1,5 @@
 import RelaySettings from '@renderer/components/RelaySettings'
+import { Button } from '@renderer/components/ui/button'
 import { Popover, PopoverContent, PopoverTrigger } from '@renderer/components/ui/popover'
 import { ScrollArea } from '@renderer/components/ui/scroll-area'
 import { Server } from 'lucide-react'
@@ -6,11 +7,10 @@ import { Server } from 'lucide-react'
 export default function RelaySettingsPopover() {
   return (
     <Popover>
-      <PopoverTrigger
-        className="non-draggable h-7 w-7 p-0 rounded-full flex items-center justify-center hover:bg-accent hover:text-accent-foreground"
-        title="relay settings"
-      >
-        <Server size={16} className="text-foreground" />
+      <PopoverTrigger asChild>
+        <Button variant="titlebar" size="titlebar" title="relay settings">
+          <Server />
+        </Button>
       </PopoverTrigger>
       <PopoverContent className="w-96 h-[450px] p-0">
         <ScrollArea className="h-full">
diff --git a/src/renderer/src/layouts/PrimaryPageLayout/index.tsx b/src/renderer/src/layouts/PrimaryPageLayout/index.tsx
index 090a303c..acd3d6f7 100644
--- a/src/renderer/src/layouts/PrimaryPageLayout/index.tsx
+++ b/src/renderer/src/layouts/PrimaryPageLayout/index.tsx
@@ -3,8 +3,9 @@ import { Titlebar } from '@renderer/components/Titlebar'
 import { ScrollArea } from '@renderer/components/ui/scroll-area'
 import { isMacOS } from '@renderer/lib/platform'
 import { forwardRef, useImperativeHandle, useRef } from 'react'
-import RelaySettingsPopover from './RelaySettingsPopover'
+import AccountButton from './AccountButton'
 import RefreshButton from './RefreshButton'
+import RelaySettingsPopover from './RelaySettingsPopover'
 
 const PrimaryPageLayout = forwardRef(
   (
@@ -46,7 +47,10 @@ export type TPrimaryPageLayoutRef = {
 export function PrimaryPageTitlebar({ content }: { content?: React.ReactNode }) {
   return (
     <Titlebar className={`justify-between ${isMacOS() ? 'pl-20' : ''}`}>
-      <div>{content}</div>
+      <div className="flex gap-1">
+        <AccountButton />
+        {content}
+      </div>
       <div className="flex gap-1">
         <RefreshButton />
         <RelaySettingsPopover />
diff --git a/src/renderer/src/layouts/SecondaryPageLayout/BackButton.tsx b/src/renderer/src/layouts/SecondaryPageLayout/BackButton.tsx
index 616f51e2..0970f3ad 100644
--- a/src/renderer/src/layouts/SecondaryPageLayout/BackButton.tsx
+++ b/src/renderer/src/layouts/SecondaryPageLayout/BackButton.tsx
@@ -1,4 +1,4 @@
-import { TitlebarButton } from '@renderer/components/Titlebar'
+import { Button } from '@renderer/components/ui/button'
 import { useSecondaryPage } from '@renderer/PageManager'
 import { ChevronLeft } from 'lucide-react'
 
@@ -8,9 +8,9 @@ export default function BackButton({ hide = false }: { hide?: boolean }) {
   return (
     <>
       {!hide && (
-        <TitlebarButton onClick={() => pop()}>
+        <Button variant="titlebar" size="titlebar" title="back" onClick={() => pop()}>
           <ChevronLeft />
-        </TitlebarButton>
+        </Button>
       )}
     </>
   )
diff --git a/src/renderer/src/layouts/SecondaryPageLayout/ThemeToggle.tsx b/src/renderer/src/layouts/SecondaryPageLayout/ThemeToggle.tsx
index c817efc2..9cca61c2 100644
--- a/src/renderer/src/layouts/SecondaryPageLayout/ThemeToggle.tsx
+++ b/src/renderer/src/layouts/SecondaryPageLayout/ThemeToggle.tsx
@@ -1,5 +1,5 @@
+import { Button } from '@renderer/components/ui/button'
 import { useTheme } from '@renderer/providers/ThemeProvider'
-import { TitlebarButton } from '@renderer/components/Titlebar'
 import { Moon, Sun, SunMoon } from 'lucide-react'
 
 export default function ThemeToggle() {
@@ -8,17 +8,32 @@ export default function ThemeToggle() {
   return (
     <>
       {themeSetting === 'system' ? (
-        <TitlebarButton onClick={() => setThemeSetting('light')} title="switch to light theme">
+        <Button
+          variant="titlebar"
+          size="titlebar"
+          onClick={() => setThemeSetting('light')}
+          title="switch to light theme"
+        >
           <SunMoon />
-        </TitlebarButton>
+        </Button>
       ) : themeSetting === 'light' ? (
-        <TitlebarButton onClick={() => setThemeSetting('dark')} title="switch to dark theme">
+        <Button
+          variant="titlebar"
+          size="titlebar"
+          onClick={() => setThemeSetting('dark')}
+          title="switch to dark theme"
+        >
           <Sun />
-        </TitlebarButton>
+        </Button>
       ) : (
-        <TitlebarButton onClick={() => setThemeSetting('system')} title="switch to system theme">
+        <Button
+          variant="titlebar"
+          size="titlebar"
+          onClick={() => setThemeSetting('system')}
+          title="switch to system theme"
+        >
           <Moon />
-        </TitlebarButton>
+        </Button>
       )}
     </>
   )
diff --git a/src/renderer/src/providers/NostrProvider.tsx b/src/renderer/src/providers/NostrProvider.tsx
new file mode 100644
index 00000000..248ad660
--- /dev/null
+++ b/src/renderer/src/providers/NostrProvider.tsx
@@ -0,0 +1,68 @@
+import { TDraftEvent } from '@common/types'
+import { createContext, useContext, useEffect, useState } from 'react'
+import client from '@renderer/services/client.service'
+
+type TNostrContext = {
+  pubkey: string | null
+  canLogin: boolean
+  login: (nsec: string) => Promise<string>
+  logout: () => Promise<void>
+  publish: (draftEvent: TDraftEvent) => Promise<void>
+}
+
+const NostrContext = createContext<TNostrContext | undefined>(undefined)
+
+export const useNostr = () => {
+  const context = useContext(NostrContext)
+  if (!context) {
+    throw new Error('useNostr must be used within a NostrProvider')
+  }
+  return context
+}
+
+export function NostrProvider({ children }: { children: React.ReactNode }) {
+  const [pubkey, setPubkey] = useState<string | null>(null)
+  const [canLogin, setCanLogin] = useState(false)
+
+  useEffect(() => {
+    window.api.nostr.getPublicKey().then((pubkey) => {
+      if (pubkey) {
+        setPubkey(pubkey)
+      }
+    })
+    window.api.system.isEncryptionAvailable().then((isEncryptionAvailable) => {
+      setCanLogin(isEncryptionAvailable)
+    })
+  }, [])
+
+  const login = async (nsec: string) => {
+    if (!canLogin) {
+      throw new Error('encryption is not available')
+    }
+    const { pubkey, reason } = await window.api.nostr.login(nsec)
+    if (!pubkey) {
+      throw new Error(reason ?? 'invalid nsec')
+    }
+    setPubkey(pubkey)
+    return pubkey
+  }
+
+  const logout = async () => {
+    await window.api.nostr.logout()
+    setPubkey(null)
+  }
+
+  const publish = async (draftEvent: TDraftEvent) => {
+    const event = await window.api.nostr.signEvent(draftEvent)
+    if (!event) {
+      throw new Error('sign event failed')
+    }
+    await client.publishEvent(event)
+  }
+
+  return (
+    <NostrContext.Provider value={{ pubkey, canLogin, login, logout, publish }}>
+      {children}
+    </NostrContext.Provider>
+  )
+}
diff --git a/src/renderer/src/services/client.service.ts b/src/renderer/src/services/client.service.ts
index 2d7fca7f..a6195c3e 100644
--- a/src/renderer/src/services/client.service.ts
+++ b/src/renderer/src/services/client.service.ts
@@ -74,6 +74,11 @@ class ClientService {
     return this.pool.listConnectionStatus()
   }
 
+  async publishEvent(event: NEvent) {
+    // TODO: outbox
+    return await Promise.any(this.pool.publish(this.relayUrls, event))
+  }
+
   subscribeEvents(
     urls: string[],
     filter: Filter,
@@ -82,7 +87,6 @@ class ClientService {
       onNew: (evt: NEvent) => void
     }
   ) {
-    console.log('subscribeEvents', urls, filter)
     const events: NEvent[] = []
     let eose = false
     return this.pool.subscribeMany(urls, [filter], {