diff --git a/src/KeyKeeper/ViewModels/RepositoryWindowViewModel.cs b/src/KeyKeeper/ViewModels/RepositoryWindowViewModel.cs
index 6626261..4db29c9 100644
--- a/src/KeyKeeper/ViewModels/RepositoryWindowViewModel.cs
+++ b/src/KeyKeeper/ViewModels/RepositoryWindowViewModel.cs
@@ -1,13 +1,19 @@
 using System;
 using System.Threading.Tasks;
+using Avalonia.Threading;
 using KeyKeeper.PasswordStore;
 
 namespace KeyKeeper.ViewModels;
 
 public partial class RepositoryWindowViewModel : ViewModelBase
 {
+    private static readonly TimeSpan LockTimeout = TimeSpan.FromMinutes(5);
+
     private object currentPage;
     private IPassStore passStore;
+    private DispatcherTimer? _lockTimer;
+    private DateTime _timerStart;
+    private string _lockTimerDisplay = string.Empty;
 
     public Func<string, Task> ShowErrorPopup;
 
@@ -17,6 +23,12 @@ public partial class RepositoryWindowViewModel : ViewModelBase
         set { currentPage = value; OnPropertyChanged(nameof(CurrentPage)); }
     }
 
+    public string LockTimerDisplay
+    {
+        get => _lockTimerDisplay;
+        private set { _lockTimerDisplay = value; OnPropertyChanged(nameof(LockTimerDisplay)); }
+    }
+
     public RepositoryWindowViewModel(IPassStore store)
     {
         passStore = store;
@@ -31,13 +43,70 @@ public partial class RepositoryWindowViewModel : ViewModelBase
             SwitchToLocked();
     }
 
+    /// <summary>
+    /// Ñáðàñûâàåò òàéìåð áëîêèðîâêè (âûçûâàåòñÿ ïðè ëþáîé àêòèâíîñòè ïîëüçîâàòåëÿ).
+    /// </summary>
+    public void ResetLockTimer()
+    {
+        if (_lockTimer != null && _lockTimer.IsEnabled)
+            _timerStart = DateTime.UtcNow;
+    }
+
     private void SwitchToUnlocked()
     {
         CurrentPage = new UnlockedRepositoryViewModel(passStore);
+        StartLockTimer();
     }
 
     private void SwitchToLocked()
     {
+        StopLockTimer();
         CurrentPage = new LockedRepositoryViewModel(passStore, this);
     }
+
+    private void StartLockTimer()
+    {
+        StopLockTimer();
+        _timerStart = DateTime.UtcNow;
+        _lockTimer = new DispatcherTimer
+        {
+            Interval = TimeSpan.FromSeconds(1)
+        };
+        _lockTimer.Tick += OnLockTimerTick;
+        _lockTimer.Start();
+        UpdateTimerDisplay();
+    }
+
+    private void StopLockTimer()
+    {
+        if (_lockTimer != null)
+        {
+            _lockTimer.Tick -= OnLockTimerTick;
+            _lockTimer.Stop();
+            _lockTimer = null;
+        }
+        LockTimerDisplay = string.Empty;
+    }
+
+    private void OnLockTimerTick(object? sender, EventArgs e)
+    {
+        var elapsed = DateTime.UtcNow - _timerStart;
+        var remaining = LockTimeout - elapsed;
+
+        if (remaining <= TimeSpan.Zero)
+        {
+            StopLockTimer();
+            passStore.Lock();
+            UpdateLockStatus();
+            return;
+        }
+
+        UpdateTimerDisplay(remaining);
+    }
+
+    private void UpdateTimerDisplay(TimeSpan? remaining = null)
+    {
+        var r = remaining ?? LockTimeout;
+        LockTimerDisplay = $"{r:mm\\:ss}";
+    }
 }
\ No newline at end of file
diff --git a/src/KeyKeeper/Views/RepositoryWindow.axaml b/src/KeyKeeper/Views/RepositoryWindow.axaml
index 1bf3b0d..7aaaf65 100644
--- a/src/KeyKeeper/Views/RepositoryWindow.axaml
+++ b/src/KeyKeeper/Views/RepositoryWindow.axaml
@@ -25,7 +25,30 @@
                                 FontSize="32"
                                 FontWeight="Bold" 
                                 HorizontalAlignment="Left"
-                                Margin="0,0,0,20"/>
+                                Margin="0,0,0,8"/>
+
+                        <!-- Таймер блокировки под надпи�ью KeyKeeper -->
+                        <Border Background="#CC000000"
+                                CornerRadius="6"
+                                Padding="8,4"
+                                HorizontalAlignment="Left"
+                                Margin="0,0,0,12"
+                                IsVisible="{Binding $parent[Window].DataContext.LockTimerDisplay,
+                                            Converter={x:Static StringConverters.IsNotNullOrEmpty}}">
+                            <StackPanel Orientation="Horizontal" Spacing="6" VerticalAlignment="Center">
+                                <!-- Иконка замка (Material Design lock outline) -->
+                                <Path Fill="White"
+                                      VerticalAlignment="Center"
+                                      Width="13" Height="13"
+                                      Stretch="Uniform"
+                                      Data="M18 8h-1V6c0-2.76-2.24-5-5-5S7 3.24 7 6v2H6c-1.1 0-2 .9-2 2v10c0 1.1.9 2 2 2h12c1.1 0 2-.9 2-2V10c0-1.1-.9-2-2-2zm-6 9c-1.1 0-2-.9-2-2s.9-2 2-2 2 .9 2 2-.9 2-2 2zm3.1-9H8.9V6c0-1.71 1.39-3.1 3.1-3.1 1.71 0 3.1 1.39 3.1 3.1v2z"/>
+                                <TextBlock Text="{Binding $parent[Window].DataContext.LockTimerDisplay}"
+                                           Foreground="White"
+                                           FontSize="13"
+                                           FontWeight="SemiBold"
+                                           VerticalAlignment="Center"/>
+                            </StackPanel>
+                        </Border>
 
                         <!-- Рамочка  -->
                         <Border BorderBrush="Gray" 
diff --git a/src/KeyKeeper/Views/RepositoryWindow.axaml.cs b/src/KeyKeeper/Views/RepositoryWindow.axaml.cs
index 28f4279..227c950 100644
--- a/src/KeyKeeper/Views/RepositoryWindow.axaml.cs
+++ b/src/KeyKeeper/Views/RepositoryWindow.axaml.cs
@@ -10,7 +10,7 @@ using Avalonia.Controls.Presenters;
 
 namespace KeyKeeper.Views;
 
-public partial class RepositoryWindow: Window
+public partial class RepositoryWindow : Window
 {
     public RepositoryWindow(RepositoryWindowViewModel model)
     {
@@ -21,10 +21,19 @@ public partial class RepositoryWindow: Window
             await new ErrorDialog(message).ShowDialog(this);
         };
     }
-    
+
     protected override void OnOpened(EventArgs e)
     {
         base.OnOpened(e);
+        AddHandler(PointerMovedEvent, OnUserActivity, RoutingStrategies.Tunnel);
+        AddHandler(PointerPressedEvent, OnUserActivity, RoutingStrategies.Tunnel);
+        AddHandler(KeyDownEvent, OnUserActivity, RoutingStrategies.Tunnel);
+    }
+
+    private void OnUserActivity(object? sender, RoutedEventArgs e)
+    {
+        if (DataContext is RepositoryWindowViewModel vm)
+            vm.ResetLockTimer();
     }
 
     private async void AddEntryButton_Click(object sender, RoutedEventArgs args)
@@ -59,7 +68,8 @@ public partial class RepositoryWindow: Window
         }
     }
 
-    private void EntryContextMenuItem_Click(object sender, RoutedEventArgs args) {
+    private void EntryContextMenuItem_Click(object sender, RoutedEventArgs args)
+    {
         if (args.Source is StyledElement s)
         {
             if (s.DataContext is PassStoreEntryPassword pwd)