diff --git a/OpenKeychain/src/main/java/org/sufficientlysecure/keychain/provider/KeychainContract.java b/OpenKeychain/src/main/java/org/sufficientlysecure/keychain/provider/KeychainContract.java
index 276598f4b..0b4100de1 100644
--- a/OpenKeychain/src/main/java/org/sufficientlysecure/keychain/provider/KeychainContract.java
+++ b/OpenKeychain/src/main/java/org/sufficientlysecure/keychain/provider/KeychainContract.java
@@ -145,6 +145,7 @@ public class KeychainContract {
         public static final String HAS_CERTIFY = "has_certify";
         public static final String HAS_AUTHENTICATE = "has_authenticate";
         public static final String HAS_DUPLICATE_USER_ID = "has_duplicate_user_id";
+        public static final String API_KNOWN_TO_PACKAGE_NAMES = "known_to_apps";
 
         public static final Uri CONTENT_URI = BASE_CONTENT_URI_INTERNAL.buildUpon()
                 .appendPath(BASE_KEY_RINGS).build();
diff --git a/OpenKeychain/src/main/java/org/sufficientlysecure/keychain/provider/KeychainProvider.java b/OpenKeychain/src/main/java/org/sufficientlysecure/keychain/provider/KeychainProvider.java
index fc7c93eea..99b583ed2 100644
--- a/OpenKeychain/src/main/java/org/sufficientlysecure/keychain/provider/KeychainProvider.java
+++ b/OpenKeychain/src/main/java/org/sufficientlysecure/keychain/provider/KeychainProvider.java
@@ -342,6 +342,9 @@ public class KeychainProvider extends ContentProvider {
                 projectionMap.put(KeyRings.IS_EXPIRED,
                         "(" + Tables.KEYS + "." + Keys.EXPIRY + " IS NOT NULL AND " + Tables.KEYS + "." + Keys.EXPIRY
                                 + " < " + new Date().getTime() / 1000 + ") AS " + KeyRings.IS_EXPIRED);
+                projectionMap.put(KeyRings.API_KNOWN_TO_PACKAGE_NAMES,
+                        "GROUP_CONCAT(aTI." + ApiTrustIdentity.PACKAGE_NAME + ") AS "
+                        + KeyRings.API_KNOWN_TO_PACKAGE_NAMES);
                 qb.setProjectionMap(projectionMap);
 
                 if (projection == null) {
@@ -410,6 +413,11 @@ public class KeychainProvider extends ContentProvider {
                                 + " AND ( kC." + Keys.EXPIRY + " IS NULL OR kC." + Keys.EXPIRY
                                 + " >= " + new Date().getTime() / 1000 + " )"
                                 + ")" : "")
+                        + (plist.contains(KeyRings.API_KNOWN_TO_PACKAGE_NAMES) ?
+                            " LEFT JOIN " + Tables.API_TRUST_IDENTITIES + " AS aTI ON ("
+                                    +"aTI." + Keys.MASTER_KEY_ID
+                                    + " = " + Tables.KEYS + "." + Keys.MASTER_KEY_ID
+                                    + ")" : "")
                     );
                 qb.appendWhere(Tables.KEYS + "." + Keys.RANK + " = 0");
                 // in case there are multiple verifying certificates
diff --git a/OpenKeychain/src/main/java/org/sufficientlysecure/keychain/ui/adapter/KeySectionedListAdapter.java b/OpenKeychain/src/main/java/org/sufficientlysecure/keychain/ui/adapter/KeySectionedListAdapter.java
index da7612143..1c5f266b0 100644
--- a/OpenKeychain/src/main/java/org/sufficientlysecure/keychain/ui/adapter/KeySectionedListAdapter.java
+++ b/OpenKeychain/src/main/java/org/sufficientlysecure/keychain/ui/adapter/KeySectionedListAdapter.java
@@ -19,10 +19,13 @@
 package org.sufficientlysecure.keychain.ui.adapter;
 
 import android.content.Context;
+import android.content.pm.ApplicationInfo;
+import android.content.pm.PackageManager;
 import android.database.Cursor;
 import android.database.MatrixCursor;
 import android.database.MergeCursor;
 import android.graphics.PorterDuff;
+import android.graphics.drawable.Drawable;
 import android.support.v4.content.ContextCompat;
 import android.text.TextUtils;
 import android.text.format.DateUtils;
@@ -38,6 +41,7 @@ import com.futuremind.recyclerviewfastscroll.SectionTitleProvider;
 import org.sufficientlysecure.keychain.Constants;
 import org.sufficientlysecure.keychain.R;
 import org.sufficientlysecure.keychain.provider.KeychainContract;
+import org.sufficientlysecure.keychain.provider.KeychainContract.KeyRings;
 import org.sufficientlysecure.keychain.ui.util.FormattingUtils;
 import org.sufficientlysecure.keychain.ui.util.Highlighter;
 import org.sufficientlysecure.keychain.ui.util.KeyFormattingUtils;
@@ -47,6 +51,8 @@ import org.sufficientlysecure.keychain.util.Log;
 
 import java.util.ArrayList;
 import java.util.Arrays;
+import java.util.Collections;
+import java.util.HashMap;
 import java.util.List;
 
 public class KeySectionedListAdapter extends SectionCursorAdapter<KeySectionedListAdapter.KeyListCursor, Character,
@@ -348,12 +354,13 @@ public class KeySectionedListAdapter extends SectionCursorAdapter<KeySectionedLi
     public class KeyItemViewHolder extends SectionCursorAdapter.ViewHolder
             implements View.OnClickListener, View.OnLongClickListener {
 
-        private TextView mMainUserId;
-        private TextView mMainUserIdRest;
-        private TextView mCreationDate;
-        private ImageView mStatus;
-        private View mSlinger;
-        private ImageButton mSlingerButton;
+        private final ViewGroup mTrustIdIcons;
+        private final TextView mMainUserId;
+        private final TextView mMainUserIdRest;
+        private final TextView mCreationDate;
+        private final ImageView mStatus;
+        private final View mSlinger;
+        private final ImageButton mSlingerButton;
 
         KeyItemViewHolder(View itemView) {
             super(itemView);
@@ -364,6 +371,7 @@ public class KeySectionedListAdapter extends SectionCursorAdapter<KeySectionedLi
             mSlinger = itemView.findViewById(R.id.key_list_item_slinger_view);
             mSlingerButton = (ImageButton) itemView.findViewById(R.id.key_list_item_slinger_button);
             mCreationDate = (TextView) itemView.findViewById(R.id.key_list_item_creation);
+            mTrustIdIcons = (ViewGroup) itemView.findViewById(R.id.key_list_item_tid_icon);
 
             itemView.setClickable(true);
             itemView.setLongClickable(true);
@@ -485,6 +493,31 @@ public class KeySectionedListAdapter extends SectionCursorAdapter<KeySectionedLi
                 } else {
                     mCreationDate.setVisibility(View.GONE);
                 }
+            }
+
+            { // set icons
+                List<String> packageNames = keyItem.getTrustIdPackages();
+
+                LayoutInflater layoutInflater = LayoutInflater.from(getContext());
+                while (mTrustIdIcons.getChildCount() < packageNames.size()) {
+                    layoutInflater.inflate(R.layout.trust_id_icon, mTrustIdIcons, true);
+                }
+
+                int visibleIcons = 0;
+                for (int i = 0; i < packageNames.size(); i++) {
+                    ImageView imageView = (ImageView) mTrustIdIcons.getChildAt(i);
+                    Drawable drawable = getDrawableForPackageName(packageNames.get(i));
+                    if (drawable == null) {
+                        continue;
+                    }
+
+                    imageView.setImageDrawable(drawable);
+                    imageView.setVisibility(View.VISIBLE);
+                    visibleIcons += 1;
+                }
+                for (int i = visibleIcons; i < mTrustIdIcons.getChildCount(); i++) {
+                    mTrustIdIcons.getChildAt(i).setVisibility(View.GONE);
+                }
 
             }
         }
@@ -562,7 +595,8 @@ public class KeySectionedListAdapter extends SectionCursorAdapter<KeySectionedLi
                     KeychainContract.KeyRings.VERIFIED,
                     KeychainContract.KeyRings.HAS_ANY_SECRET,
                     KeychainContract.KeyRings.FINGERPRINT,
-                    KeychainContract.KeyRings.HAS_ENCRYPT
+                    KeychainContract.KeyRings.HAS_ENCRYPT,
+                    KeychainContract.KeyRings.API_KNOWN_TO_PACKAGE_NAMES
             ));
 
             PROJECTION = arr.toArray(new String[arr.size()]);
@@ -603,6 +637,15 @@ public class KeySectionedListAdapter extends SectionCursorAdapter<KeySectionedLi
             int index = getColumnIndexOrThrow(KeychainContract.KeyRings.VERIFIED);
             return getInt(index) > 0;
         }
+
+        public List<String> getTrustIdPackages() {
+            int index = getColumnIndexOrThrow(KeyRings.API_KNOWN_TO_PACKAGE_NAMES);
+            String packageNames = getString(index);
+            if (packageNames == null) {
+                return Collections.EMPTY_LIST;
+            }
+            return Arrays.asList(packageNames.split(","));
+        }
     }
 
     public interface KeyListListener {
@@ -614,4 +657,24 @@ public class KeySectionedListAdapter extends SectionCursorAdapter<KeySectionedLi
 
         void onSelectionStateChanged(int selectedCount);
     }
+
+    private HashMap<String, Drawable> appIconCache = new HashMap<>();
+
+    private Drawable getDrawableForPackageName(String packageName) {
+        if (appIconCache.containsKey(packageName)) {
+            return appIconCache.get(packageName);
+        }
+
+        PackageManager pm = getContext().getPackageManager();
+        try {
+            ApplicationInfo ai = pm.getApplicationInfo(packageName, 0);
+
+            Drawable appIcon = pm.getApplicationIcon(ai);
+            appIconCache.put(packageName, appIcon);
+
+            return appIcon;
+        } catch (PackageManager.NameNotFoundException e) {
+            return null;
+        }
+    }
 }
diff --git a/OpenKeychain/src/main/java/org/sufficientlysecure/keychain/ui/util/adapter/CursorAdapter.java b/OpenKeychain/src/main/java/org/sufficientlysecure/keychain/ui/util/adapter/CursorAdapter.java
index 75b1c9ff0..e9fb2f035 100644
--- a/OpenKeychain/src/main/java/org/sufficientlysecure/keychain/ui/util/adapter/CursorAdapter.java
+++ b/OpenKeychain/src/main/java/org/sufficientlysecure/keychain/ui/util/adapter/CursorAdapter.java
@@ -392,7 +392,8 @@ public abstract class CursorAdapter<C extends CursorAdapter.AbstractCursor, VH e
                     KeychainContract.KeyRings.CREATION,
                     KeychainContract.KeyRings.NAME,
                     KeychainContract.KeyRings.EMAIL,
-                    KeychainContract.KeyRings.COMMENT
+                    KeychainContract.KeyRings.COMMENT,
+                    KeychainContract.KeyRings.API_KNOWN_TO_PACKAGE_NAMES
             ));
 
             PROJECTION = arr.toArray(new String[arr.size()]);
diff --git a/OpenKeychain/src/main/res/layout/key_list_item.xml b/OpenKeychain/src/main/res/layout/key_list_item.xml
index 43f12342b..dba6801ed 100644
--- a/OpenKeychain/src/main/res/layout/key_list_item.xml
+++ b/OpenKeychain/src/main/res/layout/key_list_item.xml
@@ -11,7 +11,8 @@
     android:orientation="horizontal"
     android:descendantFocusability="blocksDescendants"
     android:background="@drawable/list_item_ripple"
-    android:focusable="false">
+    android:focusable="false"
+    tools:layout_marginTop="30dp">
 
     <LinearLayout
         android:id="@+id/key_list_item_data"
@@ -24,8 +25,7 @@
         android:paddingLeft="8dp"
         android:paddingRight="4dp"
         android:paddingTop="4dp"
-        android:paddingBottom="4dp"
-        tools:visibility="gone">
+        android:paddingBottom="4dp">
 
         <TextView
             android:id="@+id/key_list_item_name"
@@ -55,12 +55,26 @@
 
     </LinearLayout>
 
+    <LinearLayout
+        android:layout_width="wrap_content"
+        android:layout_height="match_parent"
+        android:orientation="horizontal"
+        android:id="@+id/key_list_item_tid_icon"
+        android:gravity="center_vertical">
+
+        <!--
+        <include layout="@layout/trust_id_icon" />
+        -->
+
+    </LinearLayout>
+
     <LinearLayout
         android:id="@+id/key_list_item_slinger_view"
         android:layout_width="wrap_content"
         android:layout_height="?android:attr/listPreferredItemHeight"
         android:layout_gravity="center_vertical"
-        android:orientation="horizontal">
+        android:orientation="horizontal"
+        tools:visibility="gone">
 
         <View
             android:layout_width="1dip"
diff --git a/OpenKeychain/src/main/res/layout/trust_id_icon.xml b/OpenKeychain/src/main/res/layout/trust_id_icon.xml
new file mode 100644
index 000000000..706d3ea04
--- /dev/null
+++ b/OpenKeychain/src/main/res/layout/trust_id_icon.xml
@@ -0,0 +1,8 @@
+<?xml version="1.0" encoding="utf-8"?>
+<ImageView
+    xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:tools="http://schemas.android.com/tools"
+    android:layout_width="24dp"
+    android:layout_height="24dp"
+    android:layout_margin="4dp"
+    tools:src="@drawable/apps_k9" />
\ No newline at end of file