diff --git a/OpenKeychain/src/main/java/org/sufficientlysecure/keychain/securitytoken/ECKeyFormat.java b/OpenKeychain/src/main/java/org/sufficientlysecure/keychain/securitytoken/ECKeyFormat.java
index d3b4d5fd7..a35bd79ea 100644
--- a/OpenKeychain/src/main/java/org/sufficientlysecure/keychain/securitytoken/ECKeyFormat.java
+++ b/OpenKeychain/src/main/java/org/sufficientlysecure/keychain/securitytoken/ECKeyFormat.java
@@ -1,3 +1,21 @@
+/*
+ * Copyright (C) 2016 Nikita Mikhailov <nikita.s.mikhailov@gmail.com>
+ * Copyright (C) 2016-2017 Arnaud Fontaine
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
 package org.sufficientlysecure.keychain.securitytoken;
 
 import org.bouncycastle.asn1.ASN1ObjectIdentifier;
diff --git a/OpenKeychain/src/main/java/org/sufficientlysecure/keychain/securitytoken/SCP11bSecureMessaging.java b/OpenKeychain/src/main/java/org/sufficientlysecure/keychain/securitytoken/SCP11bSecureMessaging.java
index 6d287492c..ba3ec12d9 100644
--- a/OpenKeychain/src/main/java/org/sufficientlysecure/keychain/securitytoken/SCP11bSecureMessaging.java
+++ b/OpenKeychain/src/main/java/org/sufficientlysecure/keychain/securitytoken/SCP11bSecureMessaging.java
@@ -1,3 +1,20 @@
+/*
+ * Copyright (C) 2016-2017 Arnaud Fontaine
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
 package org.sufficientlysecure.keychain.securitytoken;
 
 import android.content.Context;
diff --git a/OpenKeychain/src/main/java/org/sufficientlysecure/keychain/securitytoken/SecureMessaging.java b/OpenKeychain/src/main/java/org/sufficientlysecure/keychain/securitytoken/SecureMessaging.java
index 90436a323..4107a3e18 100644
--- a/OpenKeychain/src/main/java/org/sufficientlysecure/keychain/securitytoken/SecureMessaging.java
+++ b/OpenKeychain/src/main/java/org/sufficientlysecure/keychain/securitytoken/SecureMessaging.java
@@ -1,3 +1,20 @@
+/*
+ * Copyright (C) 2016-2017 Arnaud Fontaine
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
 package org.sufficientlysecure.keychain.securitytoken;
 
 import java.io.IOException;
diff --git a/OpenKeychain/src/main/java/org/sufficientlysecure/keychain/securitytoken/SecureMessagingException.java b/OpenKeychain/src/main/java/org/sufficientlysecure/keychain/securitytoken/SecureMessagingException.java
index 5b8a8e300..9c2cd7f38 100644
--- a/OpenKeychain/src/main/java/org/sufficientlysecure/keychain/securitytoken/SecureMessagingException.java
+++ b/OpenKeychain/src/main/java/org/sufficientlysecure/keychain/securitytoken/SecureMessagingException.java
@@ -1,3 +1,20 @@
+/*
+ * Copyright (C) 2016-2017 Arnaud Fontaine
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
 package org.sufficientlysecure.keychain.securitytoken;
 
 public final class SecureMessagingException extends Exception {