Source note · Early media and ringback behavior
RFC 3960's security considerations say UAs should encrypt session descriptions (for example with S/MIME) and use media-level authentication such as SRTP, because attackers may send packets to the transport address in an early session description.
Checked 2026-09-24
- Vendor
- IETF
- Product
- SIP
- Subsystem
- early media security
- Deployment
- any
- Region
- not restricted
- Release range
- RFC 3960
- Checked
- 2026-09-24
Sources
- RFC 3960: Early Media and Ringing Tone Generation in the Session Initiation Protocol (SIP) — IETF / RFC Editor · tier 1 standards and regulators · Section 6 (Security Considerations)
Cite this note
APA
WarmTransfer. (2026, September 24). Early media and ringback behavior: source note early-media-ringback-rfc3960-security. WarmTransfer. https://warmtransfer.net/knowledge/claims/early-media-ringback-rfc3960-security
BibTeX
@misc{warmtransfer-claim-early-media-ringback-rfc3960-security,
title = {Early media and ringback behavior: source note early-media-ringback-rfc3960-security},
author = {{WarmTransfer}},
year = {2026},
url = {https://warmtransfer.net/knowledge/claims/early-media-ringback-rfc3960-security},
note = {Source note early-media-ringback-rfc3960-security, checked 2026-09-24}
}