1.6 Applicability Statement

The Session Description Protocol (SDP) Extensions allow negotiation of whether the media is encrypted and if so, what encryption key is used.

The encryption negotiation enhancements to SDP can be used when the application wants to encrypt audio/video and data collaboration media on the wire. These enhancements are used in conjunction with Transport Layer Security (TLS) to protect the encryption key if the key is passed in the SIP/SDP signaling.