RFC 4568 carries SRTP keying in the SDP media-level attribute a=crypto:<tag> <crypto-suite> <key-params> [<session-params>], where the tag is a decimal identifier unique within the media line.

Checked 2026-09-23

Vendor
IETF
Product
SDES
Subsystem
SDP attribute
Deployment
any
Region
not restricted
Release range
RFC 4568
Checked
2026-09-23

Sources

Cite this note

APA

WarmTransfer. (2026, September 23). SRTP and media encryption negotiation: source note srtp-media-security-sdes-crypto-syntax. WarmTransfer. https://warmtransfer.net/knowledge/claims/srtp-media-security-sdes-crypto-syntax

BibTeX

@misc{warmtransfer-claim-srtp-media-security-sdes-crypto-syntax,
  title  = {SRTP and media encryption negotiation: source note srtp-media-security-sdes-crypto-syntax},
  author = {{WarmTransfer}},
  year   = {2026},
  url    = {https://warmtransfer.net/knowledge/claims/srtp-media-security-sdes-crypto-syntax},
  note   = {Source note srtp-media-security-sdes-crypto-syntax, checked 2026-09-23}
}

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