STIR/SHAKEN with Transnexus OSPrey server

STIR (Secure Telephony Identity Revisited) and SHAKEN (Secure Handling of Asserted information using toKENs) are the frameworks that promise to prevent the completion of illegally spoofed calls.

STIR/SHAKEN uses digital certificates, based on common public key cryptography techniques, to ensure the calling number of a telephone call is secure. Each telephone service provider obtains their digital certificate from a certificate authority who is a trusted authority. The certificate technology enables the called party to verify that the calling number is accurate and has not been spoofed.

You can find more details in the following link

https://docs.telcobridges.com/tbwiki/FreeSBC:SHAKEN