With SDP Security Descriptions (SDES), the SRTP master key and salt travel inline in the SDP crypto attribute, and RFC 4568 requires the signaling carrying them to be protected for confidentiality and integrity (for example by TLS or S/MIME).
Checked 2026-09-24
- Vendor
- IETF
- Product
- SDES
- Subsystem
- SRTP keying
- Deployment
- any
- Region
- not restricted
- Release range
- RFC 4568
- Checked
- 2026-09-24
Sources
- RFC 4568: Session Description Protocol (SDP) Security Descriptions for Media Streams — IETF / RFC Editor · tier 1 standards and regulators · Section 3 (applicability), 6.1 (inline key), 8.3 (signaling protection)
Cite this note
APA
WarmTransfer. (2026, September 24). SIP capture and analysis with Wireshark and sngrep and HOMER: source note sip-capture-analysis-sdes-keys-in-sdp. WarmTransfer. https://warmtransfer.net/knowledge/claims/sip-capture-analysis-sdes-keys-in-sdp
BibTeX
@misc{warmtransfer-claim-sip-capture-analysis-sdes-keys-in-sdp,
title = {SIP capture and analysis with Wireshark and sngrep and HOMER: source note sip-capture-analysis-sdes-keys-in-sdp},
author = {{WarmTransfer}},
year = {2026},
url = {https://warmtransfer.net/knowledge/claims/sip-capture-analysis-sdes-keys-in-sdp},
note = {Source note sip-capture-analysis-sdes-keys-in-sdp, checked 2026-09-24}
}