Data at a primary storage system is encrypted and remote copied to a secondary storage system. A Remote Copy Configuration Information (RCCI) is created that identifies the encryption mechanism, keys, data source volume, and target volume for the remote copy. The RCCI is backed up on a trusted computer...http://www.google.de/patents/US7383462?utm_source=gb-gplus-sharePatent US7383462 - Method and apparatus for encrypted remote copy for secure data backup and restoration
