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An Introduction and Overview of the STIR / SHAKEN Framework

Presented by Martin Dolly, Lead Member Technical Staff, Core & Government/Regulatory Standards, AT&T, and Director, SIP Forum.

The SHAKEN (Signature-based Handling of Asserted information using toKENs) specification is a major advancement in industry efforts to mitigate unwanted robocalls and caller ID spoofing. Developed to efficiently implement the IETF’s STIR (Secure Telephony Identity Revisited) standard, SHAKEN defines a signature to verify the calling number and specifies how it will be transported in SIP “on the wire.” The SHAKEN framework provides guidance for service providers to implement STIR. Together, STIR/SHAKEN offers a practical mechanism to provide verified information about the calling party as well as the origin of the call — what is known as “attestation” — for the first time in the network. Giving service providers the tools needed to sign and verify calling numbers makes it possible for consumers to know, before answering, that the calls they receive are from legitimate parties.