SSE+ Symantec PGP Encryption Solutions STS Symantec Endpoint Protection 12.1 STS Symantec Messaging Gateway 9.5 SSE+ Symantec Backup Exec 2012 SSE+ Symantec Protection Suite Enterprise Edition 4.0 STS Symantec Backup Exec 2012 SSE+ Symantec Endpoint Protection 12.1 (September 2012) SSE+ Symantec Messaging Gateway 10 SSE Symantec Encryption Solutions for Endpoints (November 2013)