diff --git a/app/src/main/java/com/nextcloud/talk/activities/BaseActivity.java b/app/src/main/java/com/nextcloud/talk/activities/BaseActivity.java
index 80f2408d1..8eacbd4f6 100644
--- a/app/src/main/java/com/nextcloud/talk/activities/BaseActivity.java
+++ b/app/src/main/java/com/nextcloud/talk/activities/BaseActivity.java
@@ -23,11 +23,13 @@ package com.nextcloud.talk.activities;
 import android.annotation.SuppressLint;
 import android.os.Bundle;
 import android.util.Log;
+import android.view.WindowManager;
 import android.webkit.SslErrorHandler;
 
 import com.nextcloud.talk.R;
 import com.nextcloud.talk.application.NextcloudTalkApplication;
 import com.nextcloud.talk.events.CertificateEvent;
+import com.nextcloud.talk.utils.preferences.AppPreferences;
 import com.nextcloud.talk.utils.ssl.MagicTrustManager;
 import com.yarolegovich.lovelydialog.LovelyStandardDialog;
 
@@ -53,10 +55,16 @@ public class BaseActivity extends AppCompatActivity {
     @Inject
     EventBus eventBus;
 
+    @Inject
+    AppPreferences appPreferences;
+
     @Override
     protected void onCreate(Bundle savedInstanceState) {
         NextcloudTalkApplication.getSharedApplication().getComponentApplication().inject(this);
         super.onCreate(savedInstanceState);
+        if (appPreferences.getIsScreenSecured()) {
+            getWindow().setFlags(WindowManager.LayoutParams.FLAG_SECURE, WindowManager.LayoutParams.FLAG_SECURE);
+        }
     }
 
     public void showCertificateDialog(X509Certificate cert, MagicTrustManager magicTrustManager,
diff --git a/app/src/main/java/com/nextcloud/talk/controllers/ChatController.java b/app/src/main/java/com/nextcloud/talk/controllers/ChatController.java
index 4b8a61154..644037b32 100644
--- a/app/src/main/java/com/nextcloud/talk/controllers/ChatController.java
+++ b/app/src/main/java/com/nextcloud/talk/controllers/ChatController.java
@@ -73,6 +73,7 @@ import com.nextcloud.talk.presenters.MentionAutocompletePresenter;
 import com.nextcloud.talk.utils.*;
 import com.nextcloud.talk.utils.bundle.BundleKeys;
 import com.nextcloud.talk.utils.database.user.UserUtils;
+import com.nextcloud.talk.utils.preferences.AppPreferences;
 import com.nextcloud.talk.utils.singletons.ApplicationWideCurrentRoomHolder;
 import com.otaliastudios.autocomplete.Autocomplete;
 import com.otaliastudios.autocomplete.AutocompleteCallback;
@@ -113,6 +114,8 @@ public class ChatController extends BaseController implements MessagesListAdapte
     NcApi ncApi;
     @Inject
     UserUtils userUtils;
+    @Inject
+    AppPreferences appPreferences;
     @BindView(R.id.messagesListView)
     MessagesList messagesListView;
     @BindView(R.id.messageInputView)
@@ -152,6 +155,8 @@ public class ChatController extends BaseController implements MessagesListAdapte
     private boolean isHelloClicked;
     private boolean isLeavingForConversation;
 
+    private boolean isLinkPreviewAllowed;
+
     private static final byte CONTENT_TYPE_SYSTEM_MESSAGE = 1;
 
     private boolean wasDetached;
@@ -443,6 +448,7 @@ public class ChatController extends BaseController implements MessagesListAdapte
         ApplicationWideCurrentRoomHolder.getInstance().setInCall(false);
         ApplicationWideCurrentRoomHolder.getInstance().setUserInRoom(conversationUser);
 
+        isLinkPreviewAllowed = appPreferences.getAreLinkPreviewsAllowed();
 
         emojiPopup = EmojiPopup.Builder.fromRootView(view).setOnEmojiPopupShownListener(new OnEmojiPopupShownListener() {
             @Override
@@ -856,8 +862,11 @@ public class ChatController extends BaseController implements MessagesListAdapte
                             countGroupedMessages = 0;
                         }
                     }
-                    chatMessageList.get(i).setBaseUrl(conversationUser.getBaseUrl());
-                    chatMessageList.get(i).setActiveUserId(conversationUser.getUserId());
+
+                    ChatMessage chatMessage = chatMessageList.get(i);
+                    chatMessage.setLinkPreviewAllowed(isLinkPreviewAllowed);
+                    chatMessage.setBaseUrl(conversationUser.getBaseUrl());
+                    chatMessage.setActiveUserId(conversationUser.getUserId());
                     if (globalLastKnownPastMessageId == -1 || chatMessageList.get(i).getJsonMessageId() <
                             globalLastKnownPastMessageId) {
                         globalLastKnownPastMessageId = chatMessageList.get(i).getJsonMessageId();
@@ -882,7 +891,8 @@ public class ChatController extends BaseController implements MessagesListAdapte
                     chatMessage = chatMessageList.get(i);
 
                     chatMessage.setBaseUrl(conversationUser.getBaseUrl());
-                    chatMessageList.get(i).setActiveUserId(conversationUser.getUserId());
+                    chatMessage.setActiveUserId(conversationUser.getUserId());
+                    chatMessage.setLinkPreviewAllowed(isLinkPreviewAllowed);
 
                     // if credentials are empty, we're acting as a guest
                     if (TextUtils.isEmpty(credentials) && !TextUtils.isEmpty(myFirstMessage.toString())) {
diff --git a/app/src/main/java/com/nextcloud/talk/controllers/SettingsController.java b/app/src/main/java/com/nextcloud/talk/controllers/SettingsController.java
index 9a1aa4d66..4a2611c76 100644
--- a/app/src/main/java/com/nextcloud/talk/controllers/SettingsController.java
+++ b/app/src/main/java/com/nextcloud/talk/controllers/SettingsController.java
@@ -31,6 +31,7 @@ import android.util.Log;
 import android.view.LayoutInflater;
 import android.view.View;
 import android.view.ViewGroup;
+import android.view.WindowManager;
 import android.widget.Checkable;
 import android.widget.ImageView;
 import android.widget.TextView;
@@ -153,6 +154,15 @@ public class SettingsController extends BaseController {
     @BindView(R.id.settings_always_vibrate)
     MaterialSwitchPreference shouldVibrateSwitchPreference;
 
+    @BindView(R.id.settings_incognito_keyboard)
+    MaterialSwitchPreference incognitoKeyboardSwitchPreference;
+
+    @BindView(R.id.settings_screen_security)
+    MaterialSwitchPreference screenSecuritySwitchPreference;
+
+    @BindView(R.id.settings_link_previews)
+    MaterialSwitchPreference linkPreviewsSwitchPreference;
+
     @BindView(R.id.message_text)
     TextView messageText;
 
@@ -173,6 +183,7 @@ public class SettingsController extends BaseController {
 
     private OnPreferenceValueChangedListener<String> proxyTypeChangeListener;
     private OnPreferenceValueChangedListener<Boolean> proxyCredentialsChangeListener;
+    private OnPreferenceValueChangedListener<Boolean> screenSecurityChangeListener;
 
     private Disposable profileQueryDisposable;
     private Disposable dbQueryDisposable;
@@ -198,8 +209,8 @@ public class SettingsController extends BaseController {
         getCurrentUser();
 
         appPreferences.registerProxyTypeListener(proxyTypeChangeListener = new ProxyTypeChangeListener());
-        appPreferences.registerProxyCredentialsListener(proxyCredentialsChangeListener = new
-                ProxyCredentialsChangeListener());
+        appPreferences.registerProxyCredentialsListener(proxyCredentialsChangeListener = new ProxyCredentialsChangeListener());
+        appPreferences.registerScreenSecurityListener(screenSecurityChangeListener = new ScreenSecurityChangeListener());
 
         List<String> listWithIntFields = new ArrayList<>();
         listWithIntFields.add("proxy_port");
@@ -330,6 +341,11 @@ public class SettingsController extends BaseController {
             ((Checkable)shouldVibrateSwitchPreference.findViewById(R.id.mp_checkable)).setChecked(appPreferences.getShouldVibrateSetting());
         }
 
+        ((Checkable)screenSecuritySwitchPreference.findViewById(R.id.mp_checkable)).setChecked(appPreferences.getIsScreenSecured());
+        ((Checkable)incognitoKeyboardSwitchPreference.findViewById(R.id.mp_checkable)).setChecked(appPreferences.getIsKeyboardIncognito());
+        ((Checkable)linkPreviewsSwitchPreference.findViewById(R.id.mp_checkable)).setChecked(appPreferences.getAreLinkPreviewsAllowed());
+
+
         String ringtoneName = "";
         RingtoneSettings ringtoneSettings;
         if (!TextUtils.isEmpty(appPreferences.getCallRingtoneUri())) {
@@ -532,6 +548,7 @@ public class SettingsController extends BaseController {
         if (appPreferences != null) {
             appPreferences.unregisterProxyTypeListener(proxyTypeChangeListener);
             appPreferences.unregisterProxyCredentialsListener(proxyCredentialsChangeListener);
+            appPreferences.unregisterScreenSecurityListener(screenSecurityChangeListener);
         }
         super.onDestroy();
     }
@@ -594,6 +611,21 @@ public class SettingsController extends BaseController {
         return getResources().getString(R.string.nc_app_name);
     }
 
+    private class ScreenSecurityChangeListener implements OnPreferenceValueChangedListener<Boolean> {
+
+        @Override
+        public void onChanged(Boolean newValue) {
+            if (newValue) {
+                if (getActivity() != null) {
+                    getActivity().getWindow().setFlags(WindowManager.LayoutParams.FLAG_SECURE, WindowManager.LayoutParams.FLAG_SECURE);
+                }
+            } else {
+                if (getActivity() != null) {
+                    getActivity().getWindow().clearFlags(WindowManager.LayoutParams.FLAG_SECURE);
+                }
+            }
+        }
+    }
     private class ProxyCredentialsChangeListener implements OnPreferenceValueChangedListener<Boolean> {
 
         @Override
diff --git a/app/src/main/java/com/nextcloud/talk/models/json/chat/ChatMessage.java b/app/src/main/java/com/nextcloud/talk/models/json/chat/ChatMessage.java
index 8a618c045..883425636 100644
--- a/app/src/main/java/com/nextcloud/talk/models/json/chat/ChatMessage.java
+++ b/app/src/main/java/com/nextcloud/talk/models/json/chat/ChatMessage.java
@@ -82,7 +82,7 @@ public class ChatMessage implements IMessage, MessageContentType, MessageContent
             }
         }
 
-        if (!messageTypesToIgnore.contains(getMessageType())) {
+        if (!messageTypesToIgnore.contains(getMessageType()) && isLinkPreviewAllowed) {
             return getMessage().trim();
         }
 
@@ -163,6 +163,8 @@ public class ChatMessage implements IMessage, MessageContentType, MessageContent
     public String activeUserId;
     @JsonIgnore
     public Map<String, String> selectedIndividualHashMap;
+    @JsonIgnore
+    public boolean isLinkPreviewAllowed;
 
 
     public Map<String, String> getSelectedIndividualHashMap() {
diff --git a/app/src/main/java/com/nextcloud/talk/utils/preferences/AppPreferences.java b/app/src/main/java/com/nextcloud/talk/utils/preferences/AppPreferences.java
index 078160dbb..81968215e 100644
--- a/app/src/main/java/com/nextcloud/talk/utils/preferences/AppPreferences.java
+++ b/app/src/main/java/com/nextcloud/talk/utils/preferences/AppPreferences.java
@@ -192,6 +192,58 @@ public interface AppPreferences {
     @RemoveMethod
     void removeVibrateSetting();
 
+    @KeyByString("screen_security")
+    @DefaultValue(R.bool.value_false)
+    boolean getIsScreenSecured();
+
+    @KeyByString("screen_security")
+    void setScreenSecurity(boolean value);
+
+    @KeyByString("screen_security")
+    @RemoveMethod
+    void removeScreenSecurity();
+
+    @KeyByString("screen_security")
+    @RegisterChangeListenerMethod
+    void registerScreenSecurityListener(OnPreferenceValueChangedListener<Boolean> listener);
+
+    @KeyByString("screen_security")
+    @UnregisterChangeListenerMethod
+    void unregisterScreenSecurityListener(OnPreferenceValueChangedListener<Boolean> listener);
+
+    @KeyByString("screen_lock")
+    @DefaultValue(R.bool.value_false)
+    boolean getIsScreenLocked();
+
+    @KeyByString("screen_lock")
+    void setScreenLock(boolean value);
+
+    @KeyByString("screen_lock")
+    @RemoveMethod
+    void removeScreenLock();
+
+    @KeyByString("incognito_keyboard")
+    @DefaultValue(R.bool.value_false)
+    boolean getIsKeyboardIncognito();
+
+    @KeyByString("incognito_keyboard")
+    void setIncognitoKeyboard(boolean value);
+
+    @KeyByString("incognito_keyboard")
+    @RemoveMethod
+    void removeIncognitoKeyboard();
+
+    @KeyByString("link_previews")
+    @DefaultValue(R.bool.value_true)
+    boolean getAreLinkPreviewsAllowed();
+
+    @KeyByString("link_previews")
+    void setLinkPreviewsAllowed(boolean value);
+
+    @KeyByString("link_previews")
+    @RemoveMethod
+    void removeLinkPreviews();
+
     @ClearMethod
     void clear();
 }
diff --git a/app/src/main/res/layout/controller_settings.xml b/app/src/main/res/layout/controller_settings.xml
index cb0fb571b..206c1c149 100644
--- a/app/src/main/res/layout/controller_settings.xml
+++ b/app/src/main/res/layout/controller_settings.xml
@@ -142,6 +142,40 @@
 
     </com.yarolegovich.mp.MaterialPreferenceCategory>
 
+    <com.yarolegovich.mp.MaterialPreferenceCategory
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:animateLayoutChanges="true"
+        apc:mpc_title="@string/nc_settings_privacy"
+        apc:mpc_title_color="@color/colorPrimary">
+
+        <com.yarolegovich.mp.MaterialSwitchPreference
+            android:id="@+id/settings_screen_security"
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            apc:mp_default_value="@bool/value_false"
+            apc:mp_key="@string/nc_settings_screen_security_key"
+            apc:mp_summary="@string/nc_settings_screen_security_desc"
+            apc:mp_title="@string/nc_settings_screen_security_title" />
+
+        <com.yarolegovich.mp.MaterialSwitchPreference
+            android:id="@+id/settings_incognito_keyboard"
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            apc:mp_default_value="@bool/value_false"
+            apc:mp_key="@string/nc_settings_incognito_keyboard_key"
+            apc:mp_summary="@string/nc_settings_incognito_keyboard_desc"
+            apc:mp_title="@string/nc_settings_incognito_keyboard_title" />
+
+        <com.yarolegovich.mp.MaterialSwitchPreference
+            android:id="@+id/settings_link_previews"
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            apc:mp_default_value="@bool/value_true"
+            apc:mp_key="@string/nc_settings_link_previews_key"
+            apc:mp_summary="@string/nc_settings_link_previews_desc"
+            apc:mp_title="@string/nc_settings_link_previews_title" />
+    </com.yarolegovich.mp.MaterialPreferenceCategory>
 
     <com.yarolegovich.mp.MaterialPreferenceCategory
         android:layout_width="match_parent"
@@ -202,7 +236,6 @@
             apc:mp_key="@string/nc_settings_proxy_password_key"
             apc:mp_show_value="onRight"
             apc:mp_title="@string/nc_password" />
-
     </com.yarolegovich.mp.MaterialPreferenceCategory>
 
     <com.yarolegovich.mp.MaterialPreferenceCategory
diff --git a/app/src/main/res/values/bool.xml b/app/src/main/res/values/bool.xml
index 12ba02096..b623a68b5 100644
--- a/app/src/main/res/values/bool.xml
+++ b/app/src/main/res/values/bool.xml
@@ -21,4 +21,5 @@
 
 <resources>
     <bool name="value_true">true</bool>
-</resources>
\ No newline at end of file
+    <bool name="value_false">false</bool>
+</resources>
diff --git a/app/src/main/res/values/strings.xml b/app/src/main/res/values/strings.xml
index c4f8d1a17..9b8fe6c22 100644
--- a/app/src/main/res/values/strings.xml
+++ b/app/src/main/res/values/strings.xml
@@ -83,9 +83,26 @@
     <string name="nc_settings_default_ringtone" translatable="false">Librem by feandesign</string>
     <string name="nc_settings_no_ringtone">No sound</string>
     <string name="nc_settings_vibrate">Vibrate</string>
-    <string name="nc_settings_vibrate_desc">Your phone will vibrate unless it\'s silenced</string>
+    <string name="nc_settings_vibrate_desc">Phone will unless it\'s silenced</string>
     <string name="nc_settings_vibrate_key" translatable="false">notifications_vibrate</string>
 
+    <string name="nc_settings_privacy">Privacy</string>
+    <string name="nc_settings_screen_lock_title">Screen lock</string>
+    <string name="nc_settings_screen_lock_desc">Lock %1$s with Android screen lock or fingerprint</string>
+    <string name="nc_settings_screen_lock_key" translatable="false">screen_lock</string>
+    <string name="nc_settings_screen_lock_timeout_title">Screen lock inactivity timeout</string>
+    <string name="nc_none">None</string>
+    <string name="nc_settings_screen_lock_timeout_key" translatable="false">screen_lock_timeout</string>
+    <string name="nc_settings_screen_security_title">Screen security</string>
+    <string name="nc_settings_screen_security_desc">Prevents screenshots in the recents list and inside the app</string>
+    <string name="nc_settings_screen_security_key" translatable="false">screen_security</string>
+    <string name="nc_settings_incognito_keyboard_title">Screen security</string>
+    <string name="nc_settings_incognito_keyboard_desc">Instructs keyboard to disable personalized learning (without guarantees)</string>
+    <string name="nc_settings_incognito_keyboard_key" translatable="false">incognito_keyboard</string>
+    <string name="nc_settings_link_previews_title">Show link previews</string>
+    <string name="nc_settings_link_previews_desc">Allows previews of content from received links for supported services</string>
+    <string name="nc_settings_link_previews_key" translatable="false">link_previews</string>
+
 
     <string name="nc_no_proxy">No proxy</string>
     <string name="nc_username">Username</string>