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AT&T, Comcast successfully test SHAKEN/STIR protocol for fighting robocalls


AT&T and Comcast announced today that they've successfully tested what they believe to be the first SHAKEN/STIR-authenticated call between two different telecom networks.

SHAKEN/STIR stands for Signature-based Handling of Asserted Information Using toKENs (SHAKEN) and the Secure Telephone Identity Revisited (STIR), and is a protocol for authenticating phone calls with the help of cryptographic certificates.

The protocol was created to address the problem of call spoofing --calls that claim to come from a number or network, but they don't.

SHAKEN/STIR works by the network operator where the call has originated "signining" the call using a certificate. The telecom operator on the receiving end of the call can verify it came from the network the call claims it originated by looking at its certificate and making a few cryptographic checks.

Image: TransNexus

Work on the SHAKEN/STIR protocol has been underway for a while, and until now, several telecom operators have tested...(continued)

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