diff --git a/hblink.py b/hblink.py
index b0f75c9..f3de9e6 100755
--- a/hblink.py
+++ b/hblink.py
@@ -275,6 +275,8 @@ class OPENBRIDGE(DatagramProtocol):
             for system in self._CONFIG['SYSTEMS']:
                 if self._CONFIG['SYSTEMS'][system]['MODE'] == 'OPENBRIDGE':
                     if self._config['ENHANCED_OBP'] and self._config['TARGET_IP']:
+                        if '_bcka' in self._config and self._config['_bcka'] > time() - 60:
+                            continue
                         _packet = b''.join([BCTO,self._CONFIG['GLOBAL']['SERVER_ID'],self._CONFIG['SYSTEMS'][system]['NETWORK_ID'],self._CONFIG['SYSTEMS'][system]['VER'].to_bytes(1,"big"),_hops])
                         _h = blake2b(key=self._config['PASSPHRASE'], digest_size=16)
                         _h.update(_packet)
@@ -293,7 +295,7 @@ class OPENBRIDGE(DatagramProtocol):
             if self._CONFIG['SYSTEMS'][system]['MODE'] == 'OPENBRIDGE' and self._CONFIG['SYSTEMS'][system]['VER'] > 5:
                 if self._config['ENHANCED_OBP'] and self._config['TARGET_IP']:
                     _packet = b''.join([BCTO,_string,_hops])
-                    _h = blake2b(key=self._config['PASSPHRASE'], digest_size=16)
+                    _h = blake2b(key=self._CONFIG['SYSTEMS'][system]['PASSPHRASE'], digest_size=16)
                     _h.update(_packet)
                     _hash = _h.digest()
                     _packet = b''.join([_packet,_hash])