diff --git a/OpenKeychain/src/main/java/org/sufficientlysecure/keychain/ui/DecryptFragment.java b/OpenKeychain/src/main/java/org/sufficientlysecure/keychain/ui/DecryptFragment.java
index 60874de63..3bd028da4 100644
--- a/OpenKeychain/src/main/java/org/sufficientlysecure/keychain/ui/DecryptFragment.java
+++ b/OpenKeychain/src/main/java/org/sufficientlysecure/keychain/ui/DecryptFragment.java
@@ -86,6 +86,13 @@ public abstract class DecryptFragment extends Fragment {
         startActivityForResult(intent, RESULT_CODE_LOOKUP_KEY);
     }
 
+    private void showKey(long keyId) {
+        Intent viewKeyIntent = new Intent(getActivity(), ViewKeyActivity.class);
+        viewKeyIntent.setData(KeychainContract.KeyRings
+                .buildGenericKeyRingUri(keyId));
+        startActivity(viewKeyIntent);
+    }
+
     protected void startPassphraseDialog(long subkeyId) {
         Intent intent = new Intent(getActivity(), PassphraseDialogActivity.class);
         intent.putExtra(PassphraseDialogActivity.EXTRA_SUBKEY_ID, subkeyId);
@@ -145,10 +152,7 @@ public abstract class DecryptFragment extends Fragment {
                     mSignatureLayout.setOnClickListener(new View.OnClickListener() {
                         @Override
                         public void onClick(View v) {
-                            Intent viewKeyIntent = new Intent(getActivity(), ViewKeyActivity.class);
-                            viewKeyIntent.setData(KeychainContract.KeyRings
-                                    .buildGenericKeyRingUri(mSignatureKeyId));
-                            startActivity(viewKeyIntent);
+                            showKey(mSignatureKeyId);
                         }
                     });
                     break;
@@ -159,22 +163,30 @@ public abstract class DecryptFragment extends Fragment {
                     KeyFormattingUtils.setStatusImage(getActivity(), mSignatureIcon, mSignatureText, KeyFormattingUtils.STATE_UNVERIFIED);
 
                     setSignatureLayoutVisibility(View.VISIBLE);
-                    mSignatureAction.setText(R.string.decrypt_result_action_show);
-                    mSignatureAction.setCompoundDrawablesWithIntrinsicBounds(0, 0, R.drawable.ic_action_accounts, 0);
-                    mSignatureLayout.setOnClickListener(new View.OnClickListener() {
-                        @Override
-                        public void onClick(View v) {
-                            Intent viewKeyIntent = new Intent(getActivity(), ViewKeyActivity.class);
-                            viewKeyIntent.setData(KeychainContract.KeyRings
-                                    .buildGenericKeyRingUri(mSignatureKeyId));
-                            startActivity(viewKeyIntent);
-                        }
-                    });
+                    setShowAction(mSignatureAction, mSignatureKeyId);
+                    break;
+                }
+
+                case OpenPgpSignatureResult.SIGNATURE_KEY_EXPIRED: {
+                    mSignatureText.setText(R.string.decrypt_result_signature_expired_key);
+                    KeyFormattingUtils.setStatusImage(getActivity(), mSignatureIcon, mSignatureText, KeyFormattingUtils.STATE_EXPIRED);
+
+                    setSignatureLayoutVisibility(View.VISIBLE);
+                    setShowAction(mSignatureAction, mSignatureKeyId);
+                    break;
+                }
+
+                case OpenPgpSignatureResult.SIGNATURE_KEY_REVOKED: {
+                    mSignatureText.setText(R.string.decrypt_result_signature_revoked_key);
+                    KeyFormattingUtils.setStatusImage(getActivity(), mSignatureIcon, mSignatureText, KeyFormattingUtils.STATE_REVOKED);
+
+                    setSignatureLayoutVisibility(View.VISIBLE);
+                    setShowAction(mSignatureAction, mSignatureKeyId);
                     break;
                 }
 
                 case OpenPgpSignatureResult.SIGNATURE_KEY_MISSING: {
-                    mSignatureText.setText(R.string.decrypt_result_signature_unknown_pub_key);
+                    mSignatureText.setText(R.string.decrypt_result_signature_missing_key);
                     KeyFormattingUtils.setStatusImage(getActivity(), mSignatureIcon, mSignatureText, KeyFormattingUtils.STATE_UNKNOWN_KEY);
 
                     setSignatureLayoutVisibility(View.VISIBLE);
@@ -189,7 +201,6 @@ public abstract class DecryptFragment extends Fragment {
                     break;
                 }
 
-                // TODO: Maybe this should be part of the Result parcel, it is an error, not a valid status!
                 case OpenPgpSignatureResult.SIGNATURE_ERROR: {
                     mSignatureText.setText(R.string.decrypt_result_invalid_signature);
                     KeyFormattingUtils.setStatusImage(getActivity(), mSignatureIcon, mSignatureText, KeyFormattingUtils.STATE_INVALID);
@@ -214,6 +225,17 @@ public abstract class DecryptFragment extends Fragment {
         mSignatureDivider2.setVisibility(visibility);
     }
 
+    private void setShowAction(TextView signatureAction, final long signatureKeyId) {
+        signatureAction.setText(R.string.decrypt_result_action_show);
+        signatureAction.setCompoundDrawablesWithIntrinsicBounds(0, 0, R.drawable.ic_action_accounts, 0);
+        signatureAction.setOnClickListener(new View.OnClickListener() {
+            @Override
+            public void onClick(View v) {
+                showKey(signatureKeyId);
+            }
+        });
+    }
+
     /**
      * Should be overridden by MessageFragment and FileFragment to start actual decryption
      */
diff --git a/OpenKeychain/src/main/res/values-cs/strings.xml b/OpenKeychain/src/main/res/values-cs/strings.xml
index 55d25958f..3276eefed 100644
--- a/OpenKeychain/src/main/res/values-cs/strings.xml
+++ b/OpenKeychain/src/main/res/values-cs/strings.xml
@@ -229,7 +229,7 @@
   <string name="error_generic_report_bug">Nastala obecná chyba, prosím vytvořte nový bug report pro OpenKeychain.</string>
   <!--results shown after decryption/verification-->
   <string name="decrypt_result_invalid_signature">Špatný podpis!</string>
-  <string name="decrypt_result_signature_unknown_pub_key">Neznámý veřejný klíč</string>
+  <string name="decrypt_result_signature_missing_key">Neznámý veřejný klíč</string>
   <string name="decrypt_result_signature_uncertified">Validní podpis (neověřen)</string>
   <string name="decrypt_result_signature_certified">Validní podpis (ověřen)</string>
   <string name="decrypt_result_decrypted">Úspěšně rozšifrováno</string>
diff --git a/OpenKeychain/src/main/res/values-de/strings.xml b/OpenKeychain/src/main/res/values-de/strings.xml
index 13533f9bb..3753068bc 100644
--- a/OpenKeychain/src/main/res/values-de/strings.xml
+++ b/OpenKeychain/src/main/res/values-de/strings.xml
@@ -246,7 +246,7 @@
   </plurals>
   <!--results shown after decryption/verification-->
   <string name="decrypt_result_invalid_signature">Ungültige Signatur!</string>
-  <string name="decrypt_result_signature_unknown_pub_key">Unbekannter öffentlicher Schlüssel</string>
+  <string name="decrypt_result_signature_missing_key">Unbekannter öffentlicher Schlüssel</string>
   <string name="decrypt_result_signature_uncertified">Gültige Signatur (nicht beglaubigt)</string>
   <string name="decrypt_result_signature_certified">Gültige Signatur (beglaubigt)</string>
   <string name="decrypt_result_decrypted">Erfolgreich entschlüsselt</string>
diff --git a/OpenKeychain/src/main/res/values-es/strings.xml b/OpenKeychain/src/main/res/values-es/strings.xml
index b0a3fa099..6bc2abb6a 100644
--- a/OpenKeychain/src/main/res/values-es/strings.xml
+++ b/OpenKeychain/src/main/res/values-es/strings.xml
@@ -238,7 +238,7 @@
   </plurals>
   <!--results shown after decryption/verification-->
   <string name="decrypt_result_invalid_signature">¡Firma no válida!</string>
-  <string name="decrypt_result_signature_unknown_pub_key">Clave pública desconocida</string>
+  <string name="decrypt_result_signature_missing_key">Clave pública desconocida</string>
   <string name="decrypt_result_signature_uncertified">Firma válida (no certificada)</string>
   <string name="decrypt_result_signature_certified">Firma válida (certificada)</string>
   <string name="decrypt_result_decrypted">Descifrado con éxito</string>
diff --git a/OpenKeychain/src/main/res/values-fr/strings.xml b/OpenKeychain/src/main/res/values-fr/strings.xml
index 2fd8b2a88..e1cb9ec24 100644
--- a/OpenKeychain/src/main/res/values-fr/strings.xml
+++ b/OpenKeychain/src/main/res/values-fr/strings.xml
@@ -238,7 +238,7 @@
   </plurals>
   <!--results shown after decryption/verification-->
   <string name="decrypt_result_invalid_signature">Signature invalide !</string>
-  <string name="decrypt_result_signature_unknown_pub_key">Clef publique inconnue</string>
+  <string name="decrypt_result_signature_missing_key">Clef publique inconnue</string>
   <string name="decrypt_result_signature_uncertified">Signature valide (non certifiée)</string>
   <string name="decrypt_result_signature_certified">Signature valide (certifiée)</string>
   <string name="decrypt_result_decrypted">Déchiffré avec succès</string>
diff --git a/OpenKeychain/src/main/res/values-it/strings.xml b/OpenKeychain/src/main/res/values-it/strings.xml
index 8487514e8..5b79461d5 100644
--- a/OpenKeychain/src/main/res/values-it/strings.xml
+++ b/OpenKeychain/src/main/res/values-it/strings.xml
@@ -245,7 +245,7 @@ Non potrai annullare!</string>
   </plurals>
   <!--results shown after decryption/verification-->
   <string name="decrypt_result_invalid_signature">Firma non valida!</string>
-  <string name="decrypt_result_signature_unknown_pub_key">Chiave pubblica sconosciuta</string>
+  <string name="decrypt_result_signature_missing_key">Chiave pubblica sconosciuta</string>
   <string name="decrypt_result_signature_uncertified">Firma valida (non certificata)</string>
   <string name="decrypt_result_signature_certified">Firma valida (certificata)</string>
   <string name="decrypt_result_decrypted">Decodificato correttamente</string>
diff --git a/OpenKeychain/src/main/res/values-ja/strings.xml b/OpenKeychain/src/main/res/values-ja/strings.xml
index 285a3e050..86927d621 100644
--- a/OpenKeychain/src/main/res/values-ja/strings.xml
+++ b/OpenKeychain/src/main/res/values-ja/strings.xml
@@ -254,7 +254,7 @@
   </plurals>
   <!--results shown after decryption/verification-->
   <string name="decrypt_result_invalid_signature">不正な署名です!</string>
-  <string name="decrypt_result_signature_unknown_pub_key">不明な公開鍵</string>
+  <string name="decrypt_result_signature_missing_key">不明な公開鍵</string>
   <string name="decrypt_result_signature_uncertified">正しい署名 (未証明)</string>
   <string name="decrypt_result_signature_certified">正しい署名 (証明ずみ)</string>
   <string name="decrypt_result_decrypted">復号化に成功した</string>
diff --git a/OpenKeychain/src/main/res/values-nl/strings.xml b/OpenKeychain/src/main/res/values-nl/strings.xml
index c076bbde4..e45b3b62f 100644
--- a/OpenKeychain/src/main/res/values-nl/strings.xml
+++ b/OpenKeychain/src/main/res/values-nl/strings.xml
@@ -174,7 +174,7 @@
   </plurals>
   <!--results shown after decryption/verification-->
   <string name="decrypt_result_invalid_signature">Ongeldige handtekening!</string>
-  <string name="decrypt_result_signature_unknown_pub_key">Onbekende publieke sleutel</string>
+  <string name="decrypt_result_signature_missing_key">Onbekende publieke sleutel</string>
   <string name="decrypt_result_signature_uncertified">Geldige handtekening (ongecertificeerd)</string>
   <string name="decrypt_result_signature_certified">Geldige handtekening (gecertificeerd)</string>
   <string name="decrypt_result_decrypted">Succesvol gedecodeerd</string>
diff --git a/OpenKeychain/src/main/res/values-pl/strings.xml b/OpenKeychain/src/main/res/values-pl/strings.xml
index 8effd7f98..e4653d403 100644
--- a/OpenKeychain/src/main/res/values-pl/strings.xml
+++ b/OpenKeychain/src/main/res/values-pl/strings.xml
@@ -161,7 +161,7 @@
   </plurals>
   <!--results shown after decryption/verification-->
   <string name="decrypt_result_invalid_signature">Nieprawidłowy podpis!</string>
-  <string name="decrypt_result_signature_unknown_pub_key">Nieznany klucz publiczny</string>
+  <string name="decrypt_result_signature_missing_key">Nieznany klucz publiczny</string>
   <string name="decrypt_result_signature_uncertified">Podpis prawidłowy (bez certyfikatu)</string>
   <string name="decrypt_result_signature_certified">Podpis prawidłowy (z certyfikatem)</string>
   <string name="decrypt_result_decrypted">Odszyfrowano pomyślnie</string>
diff --git a/OpenKeychain/src/main/res/values-ru/strings.xml b/OpenKeychain/src/main/res/values-ru/strings.xml
index a0599b861..303efdf0a 100644
--- a/OpenKeychain/src/main/res/values-ru/strings.xml
+++ b/OpenKeychain/src/main/res/values-ru/strings.xml
@@ -209,7 +209,7 @@
   </plurals>
   <!--results shown after decryption/verification-->
   <string name="decrypt_result_invalid_signature">Неверная подпись!</string>
-  <string name="decrypt_result_signature_unknown_pub_key">Неизвестный ключ</string>
+  <string name="decrypt_result_signature_missing_key">Неизвестный ключ</string>
   <string name="decrypt_result_signature_uncertified">Верная подпись (не сертифицирована)</string>
   <string name="decrypt_result_signature_certified">Верная подпись (сертифицирована)</string>
   <string name="decrypt_result_decrypted">Успешно расшифровано</string>
diff --git a/OpenKeychain/src/main/res/values-sl/strings.xml b/OpenKeychain/src/main/res/values-sl/strings.xml
index 4b5e32a49..9b92ab14f 100644
--- a/OpenKeychain/src/main/res/values-sl/strings.xml
+++ b/OpenKeychain/src/main/res/values-sl/strings.xml
@@ -226,7 +226,7 @@
   </plurals>
   <!--results shown after decryption/verification-->
   <string name="decrypt_result_invalid_signature">Neveljaven podpis!</string>
-  <string name="decrypt_result_signature_unknown_pub_key">Neznan javni ključ</string>
+  <string name="decrypt_result_signature_missing_key">Neznan javni ključ</string>
   <string name="decrypt_result_signature_uncertified">Veljaven podpis (neoverjen)</string>
   <string name="decrypt_result_signature_certified">Veljaven podpis (overjen)</string>
   <string name="decrypt_result_decrypted">Uspešno dešifrirano</string>
diff --git a/OpenKeychain/src/main/res/values-sr/strings.xml b/OpenKeychain/src/main/res/values-sr/strings.xml
index 08354310c..d77809010 100644
--- a/OpenKeychain/src/main/res/values-sr/strings.xml
+++ b/OpenKeychain/src/main/res/values-sr/strings.xml
@@ -231,7 +231,7 @@
   <string name="error_generic_report_bug">Дошло је до опште грешке, направите нови извештај о грешци за Отворени кључарник.</string>
   <!--results shown after decryption/verification-->
   <string name="decrypt_result_invalid_signature">Неисправан потпис!</string>
-  <string name="decrypt_result_signature_unknown_pub_key">Непознат јавни кључ</string>
+  <string name="decrypt_result_signature_missing_key">Непознат јавни кључ</string>
   <string name="decrypt_result_signature_uncertified">Исправан потпис (неоверен)</string>
   <string name="decrypt_result_signature_certified">Исправан потпис (оверен)</string>
   <string name="decrypt_result_decrypted">Успешно дешифровано</string>
diff --git a/OpenKeychain/src/main/res/values-tr/strings.xml b/OpenKeychain/src/main/res/values-tr/strings.xml
index d4937be4d..6a96e4f5e 100644
--- a/OpenKeychain/src/main/res/values-tr/strings.xml
+++ b/OpenKeychain/src/main/res/values-tr/strings.xml
@@ -214,7 +214,7 @@
   <string name="error_generic_report_bug">Genel bir hata oluştu. Lütfen OpenKeychain için bir hata raporu oluşturun.</string>
   <!--results shown after decryption/verification-->
   <string name="decrypt_result_invalid_signature">Geçersiz imza!</string>
-  <string name="decrypt_result_signature_unknown_pub_key">Bilinmeyen açık anahtar</string>
+  <string name="decrypt_result_signature_missing_key">Bilinmeyen açık anahtar</string>
   <string name="decrypt_result_signature_uncertified">Geçerli imza (sertifikasız)</string>
   <string name="decrypt_result_signature_certified">Geçerli imza (sertifalı)</string>
   <string name="decrypt_result_decrypted">Başarıyla çözümlendi</string>
diff --git a/OpenKeychain/src/main/res/values-uk/strings.xml b/OpenKeychain/src/main/res/values-uk/strings.xml
index fdae88c7b..46d5f59c8 100644
--- a/OpenKeychain/src/main/res/values-uk/strings.xml
+++ b/OpenKeychain/src/main/res/values-uk/strings.xml
@@ -208,7 +208,7 @@
   </plurals>
   <!--results shown after decryption/verification-->
   <string name="decrypt_result_invalid_signature">Невірний підпис!</string>
-  <string name="decrypt_result_signature_unknown_pub_key">Невідомий відкритий ключ</string>
+  <string name="decrypt_result_signature_missing_key">Невідомий відкритий ключ</string>
   <string name="decrypt_result_signature_uncertified">Дійсний підпис (несертифікований)</string>
   <string name="decrypt_result_signature_certified">Дійсний підпис (сертифікований)</string>
   <string name="decrypt_result_decrypted">Успішно розшифровано.</string>
diff --git a/OpenKeychain/src/main/res/values/strings.xml b/OpenKeychain/src/main/res/values/strings.xml
index 3850f3a68..19a259cbb 100644
--- a/OpenKeychain/src/main/res/values/strings.xml
+++ b/OpenKeychain/src/main/res/values/strings.xml
@@ -268,9 +268,11 @@
     <!-- results shown after decryption/verification -->
     <string name="decrypt_result_no_signature">"Not Signed"</string>
     <string name="decrypt_result_invalid_signature">"Invalid signature!"</string>
-    <string name="decrypt_result_signature_unknown_pub_key">"Unknown public key"</string>
     <string name="decrypt_result_signature_uncertified">"Signed by (not certified!)"</string>
     <string name="decrypt_result_signature_certified">"Signed by"</string>
+    <string name="decrypt_result_signature_expired_key">"Key is expired!"</string>
+    <string name="decrypt_result_signature_revoked_key">"Key has been revoked!"</string>
+    <string name="decrypt_result_signature_missing_key">"Unknown public key"</string>
     <string name="decrypt_result_encrypted">"Encrypted"</string>
     <string name="decrypt_result_not_encrypted">"Not Encrypted"</string>
     <string name="decrypt_result_action_show">"Show"</string>