Ericsson Ericsson This document defines how the GCM-SST (Galois Counter Mode with Strong Secure Tags) Authenticated Encryption with Associated Data (AEAD) algorithm family can be used to provide confidentiality and data authentication in the Secure Real-time Transport Protocol (SRTP). GCM-SST addresses known weaknesses in AES-GCM for short authentication tags, making it well suited for media encryption use cases where low overhead is critical.