This document defines a mechanism that provides real-time notification in the backward call direction (towards the calling party), that the associated call was blocked by the indicated voice service provider due to analytics-based call processing. Approved August 16, 2022.

This standard defines how the extension to the IETF Personal Assertion Token (PASSporT) [IETF RFC 8443, PASSporT Extension for Resource-Priority Authorization] and the associated Secure Telephone Identity Revisited (STIR) mechanisms are used to sign the Session Initiation Protocol Resource-Priority Header (SIP RPH) field of National Security / Emergency Preparedness (NS/EP) Priority Services calls (i.e., calls…

This standard defines how the IETF Personal Assertion Token (PASSporT) Extension for Resource-Priority Authorization [IETF RFC 8443, PASSporT Extension for Resource-Priority Authorization], with the extensions defined in RFC 9027, Assertion Values for Resource Priority Header and SIP Priority Header Claims in Support of Emergency Services Networks, and the associated STIR mechanisms, are used to sign…

Signature-based Handling of Asserted information using toKENs (SHAKEN) is an industry framework for managing and deploying Secure Telephone Identity (STI) technologies with the purpose of providing end-to-end cryptographic authentication and verification of the telephone identity and other information in an IP-based service provider voice network. This specification expands the SHAKEN framework, introducing mechanisms for authentication,…

This document is intended to cover calls using Toll-Free Numbers (TFNs) within the SHAKEN Framework. This addresses calls where the calling party number displayed in the Caller ID is a TFN. This document considers scenarios involving the calling party’s use of the TFN in order to enable them to attain full attestation for the TFN.

This document provides telephone service providers with a framework and guidance on how to use Secure Telephone Identity (STI) technologies on IP-based service provider voice networks (also to be referred to as Voice over Internet Protocol [VoIP] networks) in scenarios where a call originates in one country and terminates in a different country. The primary…

This technical report provides a framework for SHAKEN (ATIS-1000074-E, [Ref. 1]) attestation and granularity of the Origination Identifier. Published 2020-02-13.

This Technical Report describes use cases where a Signature-based Handling of Asserted information using toKENs (SHAKEN) Originating Service Provider (OSP) may not have complete locally available information to establish a verified association between a calling telephone number (calling TN) and its direct Customer, as the basis for assigning a “full attestation” value to particular calls.…

This document provides telephone service providers with a framework and guidance on how to use Secure Telephone Identity (STI) technologies on IP-based service provider voice networks (also to be referred to as Voice over Internet Protocol [VoIP] networks) in scenarios where a call originates in one country and terminates in a different country. ATIS-1000087, Mechanism…

The base SHAKEN specification provides replay-detection mechanisms to identify cases where a malicious entity attempts to masquerade as another user by replaying parts of a legitimate INVITE request. However, these mechanisms don’t cover cases where the INVITE is replayed within the short time freshness window. This technical report describes how the mechanisms defined by draft-ietf-stir-passport-divert…