T5
STIR and SHAKEN
Identity, attestation, and the vendor pages. 3 lessons. Each lesson cites the pages that were opened, and marks the rest confirm.
A, B, and C on the STIR article
T5-R13
Wikipedia says STIR/SHAKEN is a suite of protocols and procedures intended to combat caller ID spoofing.
SHAKEN, PASSporT, and the Identity header
T5-R14
The Wikipedia article says SHAKEN stands for Signature-based Handling of Asserted information using toKENs.
Where the vendors put the same words
T5-R15
Twilio's voice docs include a page titled Trusted calling with SHAKEN/STIR, and the voice navigation lists SHAKEN/STIR overview and onboardi
Sources and go deeper
Opened 2026-10. A row marked confirm has no link, because that page was not verified.
- RFC. RFC 3261, SIP last checked 2026-10
- Wikipedia. Session Initiation Protocol last checked 2026-10
- Wikipedia. Platform as a service, Communications platform as a service section last checked 2026-10
- Confirm. Release-specific menus for this track. confirm. Not opened as a single checklist. last checked 2026-10