DSS may refer to any of the following:
1. Short for Digital Satellite Service, DSS is a transmission system for DirecTV's satellites. It is used to broadcast satellite television.
2. Short for Digital Signature Standard, DSS is an algorithm that generates a digital signature to authenticate electronic documents. It was originally developed by the National Security Agency (NSA) and then implemented by the National Institute of Standards and Technology (NIST) in 1994.