Caller-ID Vouching and Vetting (CIDVV)

A lightweight, incrementally deployable mechanism to strongly reduce Caller-ID spoofing
using existing PSTN and SIP routing behavior — no new protocol extensions required.

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Current Specification (May 2026)

Format	Link	Description
HTML	draft-anderson-askew-cidvv.html	Recommended reading
TXT	draft-anderson-askew-cidvv.txt	Plain text version
PDF	draft-anderson-askew-cidvv.pdf	Formatted PDF
XML	draft-anderson-askew-cidvv.xml	IETF submission format
Working Draft	draft-anderson-askew-cidvv-latest.md	Latest Markdown source

Supporting Documents

• CIDVV Whitepaper — Detailed motivation, use cases, and deployment guidance

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Why CIDVV?

• Works across SIP, SS7/TDM, and international paths
• Strong reachability-based anti-spoofing
• Extremely low signaling overhead
• Fully compatible with legacy networks
• Complementary to (and independent of) STIR/SHAKEN
• Easy to implement in Asterisk, Kamailio, FreeSWITCH, etc.

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Quick Links

• Call Flow Examples
• Reference Documents
• Contributing Guidelines
• License (Apache 2.0)

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Get Involved

We are actively looking for:

• Implementers and early testers
• Service provider and vendor sponsors
• Feedback from the telephony security community

Contact: Roger Anderson — roger@jollyrogertelephone.com

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Maintained as an open, community-driven standards effort by Jolly Roger Telephone Company.

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