diff --git a/quickstep/src/com/android/launcher3/taskbar/LauncherTaskbarUIController.java b/quickstep/src/com/android/launcher3/taskbar/LauncherTaskbarUIController.java
index 9a836aa..f4168d9 100644
--- a/quickstep/src/com/android/launcher3/taskbar/LauncherTaskbarUIController.java
+++ b/quickstep/src/com/android/launcher3/taskbar/LauncherTaskbarUIController.java
@@ -55,6 +55,7 @@
     private AlphaProperty mIconAlphaForHome;
     private @Nullable Animator mAnimator;
     private boolean mIsAnimatingToLauncher;
+    private TaskbarKeyguardController mKeyguardController;
 
     public LauncherTaskbarUIController(
             BaseQuickstepLauncher launcher, TaskbarActivityContext context) {
@@ -81,6 +82,7 @@
         mHotseatController.init();
         setTaskbarViewVisible(!mLauncher.hasBeenResumed());
         mLauncher.setTaskbarUIController(this);
+        mKeyguardController = taskbarControllers.taskbarKeyguardController;
     }
 
     @Override
@@ -117,6 +119,15 @@
      * Should be called from onResume() and onPause(), and animates the Taskbar accordingly.
      */
     public void onLauncherResumedOrPaused(boolean isResumed) {
+        if (mKeyguardController.isScreenOff()) {
+            if (!isResumed) {
+                return;
+            } else {
+                // Resuming implicitly means device unlocked
+                mKeyguardController.setScreenOn();
+            }
+        }
+
         long duration = QuickstepTransitionManager.CONTENT_ALPHA_DURATION;
         if (mAnimator != null) {
             mAnimator.cancel();
diff --git a/quickstep/src/com/android/launcher3/taskbar/NavbarButtonsViewController.java b/quickstep/src/com/android/launcher3/taskbar/NavbarButtonsViewController.java
index 2ae7d10..d40242c 100644
--- a/quickstep/src/com/android/launcher3/taskbar/NavbarButtonsViewController.java
+++ b/quickstep/src/com/android/launcher3/taskbar/NavbarButtonsViewController.java
@@ -22,6 +22,7 @@
 import static com.android.launcher3.taskbar.TaskbarNavButtonController.BUTTON_IME_SWITCH;
 import static com.android.launcher3.taskbar.TaskbarNavButtonController.BUTTON_RECENTS;
 import static com.android.launcher3.taskbar.TaskbarViewController.ALPHA_INDEX_IME;
+import static com.android.launcher3.taskbar.TaskbarViewController.ALPHA_INDEX_KEYGUARD;
 import static com.android.systemui.shared.system.QuickStepContract.SYSUI_STATE_A11Y_BUTTON_CLICKABLE;
 import static com.android.systemui.shared.system.QuickStepContract.SYSUI_STATE_A11Y_BUTTON_LONG_CLICKABLE;
 import static com.android.systemui.shared.system.QuickStepContract.SYSUI_STATE_IME_SHOWING;
@@ -65,6 +66,8 @@
     private static final int FLAG_IME_VISIBLE = 1 << 1;
     private static final int FLAG_ROTATION_BUTTON_VISIBLE = 1 << 2;
     private static final int FLAG_A11Y_VISIBLE = 1 << 3;
+    private static final int FLAG_ONLY_BACK_FOR_BOUNCER_VISIBLE = 1 << 4;
+    private static final int FLAG_KEYGUARD_VISIBLE = 1 << 5;
 
     private static final int MASK_IME_SWITCHER_VISIBLE = FLAG_SWITCHER_SUPPORTED | FLAG_IME_VISIBLE;
 
@@ -114,6 +117,10 @@
                     mControllers.taskbarViewController.getTaskbarIconAlpha()
                             .getProperty(ALPHA_INDEX_IME),
                     flags -> (flags & FLAG_IME_VISIBLE) == 0, MultiValueAlpha.VALUE, 1, 0));
+            mPropertyHolders.add(new StatePropertyHolder(
+                    mControllers.taskbarViewController.getTaskbarIconAlpha()
+                            .getProperty(ALPHA_INDEX_KEYGUARD),
+                    flags -> (flags & FLAG_KEYGUARD_VISIBLE) == 0, MultiValueAlpha.VALUE, 1, 0));
 
             // Rotation button
             RotationButton rotationButton = new RotationButtonImpl(addButton(mEndContainer));
@@ -136,16 +143,21 @@
         mPropertyHolders.add(new StatePropertyHolder(backButton,
                 flags -> (flags & FLAG_IME_VISIBLE) == 0, View.ROTATION, 0,
                 Utilities.isRtl(mContext.getResources()) ? 90 : -90));
+        mPropertyHolders.add(new StatePropertyHolder(backButton,
+                flags -> (flags & FLAG_KEYGUARD_VISIBLE) == 0 ||
+                        (flags & FLAG_ONLY_BACK_FOR_BOUNCER_VISIBLE) != 0));
 
         // home and recents buttons
         View homeButton = addButton(R.drawable.ic_sysbar_home, BUTTON_HOME, startContainer,
                 navButtonController);
         mPropertyHolders.add(new StatePropertyHolder(homeButton,
-                flags -> (flags & FLAG_IME_VISIBLE) == 0));
+                flags -> (flags & FLAG_IME_VISIBLE) == 0 &&
+                        (flags & FLAG_KEYGUARD_VISIBLE) == 0));
         View recentsButton = addButton(R.drawable.ic_sysbar_recent, BUTTON_RECENTS,
                 startContainer, navButtonController);
         mPropertyHolders.add(new StatePropertyHolder(recentsButton,
-                flags -> (flags & FLAG_IME_VISIBLE) == 0));
+                flags -> (flags & FLAG_IME_VISIBLE) == 0 &&
+                        (flags & FLAG_KEYGUARD_VISIBLE) == 0));
 
         // IME switcher
         View imeSwitcherButton = addButton(R.drawable.ic_ime_switcher, BUTTON_IME_SWITCH,
@@ -184,6 +196,22 @@
     }
 
     /**
+     * Should be called when we need to show back button for bouncer
+     */
+    public void setBackForBouncer(boolean isBouncerVisible) {
+        updateStateForFlag(FLAG_ONLY_BACK_FOR_BOUNCER_VISIBLE, isBouncerVisible);
+        applyState();
+    }
+
+    /**
+     * Slightly misnamed, but should be called when only keyguard OR AOD is showing
+     */
+    public void setKeyguardVisible(boolean isKeyguardVisible) {
+        updateStateForFlag(FLAG_KEYGUARD_VISIBLE, isKeyguardVisible);
+        applyState();
+    }
+
+    /**
      * Returns true if IME bar is visible
      */
     public boolean isImeVisible() {
diff --git a/quickstep/src/com/android/launcher3/taskbar/TaskbarActivityContext.java b/quickstep/src/com/android/launcher3/taskbar/TaskbarActivityContext.java
index 6e47700..2a0fbbb 100644
--- a/quickstep/src/com/android/launcher3/taskbar/TaskbarActivityContext.java
+++ b/quickstep/src/com/android/launcher3/taskbar/TaskbarActivityContext.java
@@ -18,6 +18,7 @@
 import static android.view.ViewGroup.LayoutParams.MATCH_PARENT;
 import static android.view.WindowManager.LayoutParams.LAYOUT_IN_DISPLAY_CUTOUT_MODE_ALWAYS;
 import static android.view.WindowManager.LayoutParams.TYPE_APPLICATION_OVERLAY;
+import static android.view.WindowManager.LayoutParams.TYPE_NAVIGATION_BAR_PANEL;
 
 import static com.android.systemui.shared.system.WindowManagerWrapper.ITYPE_BOTTOM_TAPPABLE_ELEMENT;
 import static com.android.systemui.shared.system.WindowManagerWrapper.ITYPE_EXTRA_NAVIGATION_BAR;
@@ -121,7 +122,8 @@
                 new RotationButtonController(this, R.color.popup_color_primary_light,
                         R.color.popup_color_primary_light),
                 new TaskbarDragLayerController(this, mDragLayer),
-                new TaskbarViewController(this, taskbarView));
+                new TaskbarViewController(this, taskbarView),
+                new TaskbarKeyguardController(this));
 
         Display display = windowContext.getDisplay();
         Context c = display.getDisplayId() == Display.DEFAULT_DISPLAY
@@ -135,7 +137,7 @@
         mWindowLayoutParams = new WindowManager.LayoutParams(
                 MATCH_PARENT,
                 mLastRequestedNonFullscreenHeight,
-                TYPE_APPLICATION_OVERLAY,
+                TYPE_NAVIGATION_BAR_PANEL,
                 WindowManager.LayoutParams.FLAG_NOT_FOCUSABLE,
                 PixelFormat.TRANSLUCENT);
         mWindowLayoutParams.setTitle(WINDOW_TITLE);
@@ -144,7 +146,6 @@
         mWindowLayoutParams.setFitInsetsTypes(0);
         mWindowLayoutParams.softInputMode = WindowManager.LayoutParams.SOFT_INPUT_ADJUST_NOTHING;
         mWindowLayoutParams.layoutInDisplayCutoutMode = LAYOUT_IN_DISPLAY_CUTOUT_MODE_ALWAYS;
-        mWindowLayoutParams.setSystemApplicationOverlay(true);
 
         WindowManagerWrapper wmWrapper = WindowManagerWrapper.getInstance();
         wmWrapper.setProvidesInsetsTypes(
@@ -213,17 +214,19 @@
                 systemUiStateFlags, forceUpdate);
         mControllers.taskbarViewController.setImeIsVisible(
                 mControllers.navbarButtonsViewController.isImeVisible());
+        mControllers.taskbarKeyguardController.updateStateForSysuiFlags(systemUiStateFlags);
     }
 
     public void onRotationProposal(int rotation, boolean isValid) {
         mControllers.rotationButtonController.onRotationProposal(rotation, isValid);
     }
 
-    public void disable(int displayId, int state1, int state2, boolean animate) {
+    public void disableNavBarElements(int displayId, int state1, int state2, boolean animate) {
         if (displayId != getDisplayId()) {
             return;
         }
         mControllers.rotationButtonController.onDisable2FlagChanged(state2);
+        mControllers.taskbarKeyguardController.disableNavbarElements(state1, state2);
     }
 
     public void onSystemBarAttributesChanged(int displayId, int behavior) {
diff --git a/quickstep/src/com/android/launcher3/taskbar/TaskbarControllers.java b/quickstep/src/com/android/launcher3/taskbar/TaskbarControllers.java
index 7712ffe..157053e 100644
--- a/quickstep/src/com/android/launcher3/taskbar/TaskbarControllers.java
+++ b/quickstep/src/com/android/launcher3/taskbar/TaskbarControllers.java
@@ -31,6 +31,7 @@
     public final RotationButtonController rotationButtonController;
     public final TaskbarDragLayerController taskbarDragLayerController;
     public final TaskbarViewController taskbarViewController;
+    public final TaskbarKeyguardController taskbarKeyguardController;
 
     /** Do not store this controller, as it may change at runtime. */
     @NonNull public TaskbarUIController uiController = TaskbarUIController.DEFAULT;
@@ -41,7 +42,8 @@
             NavbarButtonsViewController navbarButtonsViewController,
             RotationButtonController rotationButtonController,
             TaskbarDragLayerController taskbarDragLayerController,
-            TaskbarViewController taskbarViewController) {
+            TaskbarViewController taskbarViewController,
+            TaskbarKeyguardController taskbarKeyguardController) {
         this.taskbarActivityContext = taskbarActivityContext;
         this.taskbarDragController = taskbarDragController;
         this.navButtonController = navButtonController;
@@ -49,6 +51,7 @@
         this.rotationButtonController = rotationButtonController;
         this.taskbarDragLayerController = taskbarDragLayerController;
         this.taskbarViewController = taskbarViewController;
+        this.taskbarKeyguardController = taskbarKeyguardController;
     }
 
     /**
@@ -63,6 +66,7 @@
         }
         taskbarDragLayerController.init(this);
         taskbarViewController.init(this);
+        taskbarKeyguardController.init(navbarButtonsViewController);
     }
 
     /**
@@ -72,5 +76,6 @@
         uiController.onDestroy();
         rotationButtonController.onDestroy();
         taskbarDragLayerController.onDestroy();
+        taskbarKeyguardController.onDestroy();
     }
 }
diff --git a/quickstep/src/com/android/launcher3/taskbar/TaskbarKeyguardController.java b/quickstep/src/com/android/launcher3/taskbar/TaskbarKeyguardController.java
new file mode 100644
index 0000000..b7799d8
--- /dev/null
+++ b/quickstep/src/com/android/launcher3/taskbar/TaskbarKeyguardController.java
@@ -0,0 +1,104 @@
+package com.android.launcher3.taskbar;
+
+import static com.android.systemui.shared.system.QuickStepContract.SYSUI_STATE_BOUNCER_SHOWING;
+import static com.android.systemui.shared.system.QuickStepContract.SYSUI_STATE_DEVICE_DOZING;
+import static com.android.systemui.shared.system.QuickStepContract.SYSUI_STATE_STATUS_BAR_KEYGUARD_SHOWING;
+
+import android.app.KeyguardManager;
+import android.content.BroadcastReceiver;
+import android.content.Context;
+import android.content.Intent;
+import android.content.IntentFilter;
+import android.view.View;
+
+/**
+ * Controller for managing keyguard state for taskbar
+ */
+public class TaskbarKeyguardController {
+
+    private static final int KEYGUARD_SYSUI_FLAGS = SYSUI_STATE_BOUNCER_SHOWING |
+            SYSUI_STATE_STATUS_BAR_KEYGUARD_SHOWING | SYSUI_STATE_DEVICE_DOZING;
+
+    private final TaskbarActivityContext mContext;
+    private int mDisabledNavIcons;
+    private int mKeyguardSysuiFlags;
+    private boolean mBouncerShowing;
+    private NavbarButtonsViewController mNavbarButtonsViewController;
+    private final KeyguardManager mKeyguardManager;
+    private boolean mIsScreenOff;
+
+    private final BroadcastReceiver mScreenOffReceiver = new BroadcastReceiver() {
+        @Override
+        public void onReceive(Context context, Intent intent) {
+            mIsScreenOff = true;
+        }
+    };
+
+    public TaskbarKeyguardController(TaskbarActivityContext context) {
+        mContext = context;
+        mKeyguardManager = mContext.getSystemService(KeyguardManager.class);
+    }
+
+    public void init(NavbarButtonsViewController navbarButtonUIController) {
+        mNavbarButtonsViewController = navbarButtonUIController;
+        mContext.registerReceiver(mScreenOffReceiver, new IntentFilter(Intent.ACTION_SCREEN_OFF));
+    }
+
+    public void updateStateForSysuiFlags(int systemUiStateFlags) {
+        boolean bouncerShowing = (systemUiStateFlags & SYSUI_STATE_BOUNCER_SHOWING) != 0;
+        boolean keyguardShowing = (systemUiStateFlags & SYSUI_STATE_STATUS_BAR_KEYGUARD_SHOWING)
+                != 0;
+        boolean dozing = (systemUiStateFlags & SYSUI_STATE_DEVICE_DOZING) != 0;
+
+        int interestingKeyguardFlags = systemUiStateFlags & KEYGUARD_SYSUI_FLAGS;
+        if (interestingKeyguardFlags == mKeyguardSysuiFlags) {
+            return;
+        }
+        mKeyguardSysuiFlags = interestingKeyguardFlags;
+
+        mBouncerShowing = bouncerShowing;
+        if (!mContext.canShowNavButtons()) {
+            // For gesture nav we don't need to deal with bouncer or showing taskbar when locked
+            return;
+        }
+
+        mNavbarButtonsViewController.setKeyguardVisible(keyguardShowing || dozing);
+        updateIconsForBouncer();
+    }
+
+    public boolean isScreenOff() {
+        return mIsScreenOff;
+    }
+
+    public void setScreenOn() {
+        mIsScreenOff = false;
+    }
+
+    public void disableNavbarElements(int state1, int state2) {
+        if (mDisabledNavIcons == state1) {
+            // no change
+            return;
+        }
+        mDisabledNavIcons = state1;
+        updateIconsForBouncer();
+    }
+
+    /**
+     * Hides/shows taskbar when keyguard is up
+     */
+    private void updateIconsForBouncer() {
+        boolean disableBack = (mDisabledNavIcons & View.STATUS_BAR_DISABLE_BACK) != 0;
+        boolean disableRecent = (mDisabledNavIcons & View.STATUS_BAR_DISABLE_RECENT) != 0;
+        boolean disableHome = (mDisabledNavIcons & View.STATUS_BAR_DISABLE_HOME) != 0;
+        boolean onlyBackEnabled = !disableBack && disableRecent && disableHome;
+
+        boolean showBackForBouncer = onlyBackEnabled &&
+                mKeyguardManager.isDeviceSecure() &&
+                mBouncerShowing;
+        mNavbarButtonsViewController.setBackForBouncer(showBackForBouncer);
+    }
+
+    public void onDestroy() {
+        mContext.unregisterReceiver(mScreenOffReceiver);
+    }
+}
diff --git a/quickstep/src/com/android/launcher3/taskbar/TaskbarManager.java b/quickstep/src/com/android/launcher3/taskbar/TaskbarManager.java
index 3563d09..9f5ea50 100644
--- a/quickstep/src/com/android/launcher3/taskbar/TaskbarManager.java
+++ b/quickstep/src/com/android/launcher3/taskbar/TaskbarManager.java
@@ -136,10 +136,6 @@
         onSysuiFlagsChangedInternal(mSysuiStateFlags, true /* forceUpdate */);
     }
 
-    /**
-     * See {@link com.android.systemui.shared.system.QuickStepContract.SystemUiStateFlags}
-     * @param systemUiStateFlags The latest SystemUiStateFlags
-     */
     public void onSystemUiFlagsChanged(int systemUiStateFlags) {
         onSysuiFlagsChangedInternal(systemUiStateFlags, false /* forceUpdate */);
     }
@@ -157,9 +153,9 @@
         }
     }
 
-    public void disable(int displayId, int state1, int state2, boolean animate) {
+    public void disableNavBarElements(int displayId, int state1, int state2, boolean animate) {
         if (mTaskbarActivityContext != null) {
-            mTaskbarActivityContext.disable(displayId, state1, state2, animate);
+            mTaskbarActivityContext.disableNavBarElements(displayId, state1, state2, animate);
         }
     }
 
diff --git a/quickstep/src/com/android/launcher3/taskbar/TaskbarViewController.java b/quickstep/src/com/android/launcher3/taskbar/TaskbarViewController.java
index b6184c9..10cc926 100644
--- a/quickstep/src/com/android/launcher3/taskbar/TaskbarViewController.java
+++ b/quickstep/src/com/android/launcher3/taskbar/TaskbarViewController.java
@@ -27,6 +27,7 @@
     public static final int ALPHA_INDEX_HOME = 0;
     public static final int ALPHA_INDEX_LAUNCHER_STATE = 1;
     public static final int ALPHA_INDEX_IME = 2;
+    public static final int ALPHA_INDEX_KEYGUARD = 3;
 
     private final TaskbarActivityContext mActivity;
     private final TaskbarView mTaskbarView;
@@ -38,7 +39,7 @@
     public TaskbarViewController(TaskbarActivityContext activity, TaskbarView taskbarView) {
         mActivity = activity;
         mTaskbarView = taskbarView;
-        mTaskbarIconAlpha = new MultiValueAlpha(mTaskbarView, 3);
+        mTaskbarIconAlpha = new MultiValueAlpha(mTaskbarView, 4);
         mTaskbarIconAlpha.setUpdateVisibility(true);
     }
 
diff --git a/quickstep/src/com/android/quickstep/TouchInteractionService.java b/quickstep/src/com/android/quickstep/TouchInteractionService.java
index a3136c7..47ca3d2 100644
--- a/quickstep/src/com/android/quickstep/TouchInteractionService.java
+++ b/quickstep/src/com/android/quickstep/TouchInteractionService.java
@@ -274,7 +274,7 @@
         @Override
         public void disable(int displayId, int state1, int state2, boolean animate) {
             executeForTaskbarManager(() -> mTaskbarManager
-                    .disable(displayId, state1, state2, animate));
+                    .disableNavBarElements(displayId, state1, state2, animate));
         }
 
         @Override