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STIR/SHAKEN and Call Authentication

In the realm of digital communication, STIR/SHAKEN represents a framework of interconnected standards, specifically Secure Telephone Identity Revisited (STIR) and Signature-based Handling of Asserted Information Using toKENs (SHAKEN). This framework is designed to validate the handoff of phone calls passing through the complex web of networks, enabling the receiving party's phone company to verify that a call is indeed from the number displayed on Caller ID.

However, not all networks are "Stir/Shaken Ready". Up to 75% of Stir/Shaken tokens are lost in transit and never reach their intended destination. There are also limitations due to GDPR, PII, legal aspects in different jurisdictions, and commercial interests of carriers.

CodeB has harnessed the power of blockchain technology to create Call Authentication protocols that address these limitations. While fully supporting Stir/Shaken, our technology transports the token "Out of Band" to ensure delivery. It also introduces cryptographic mechanisms for GDPR and PII compliance and to protect the commercial interests of the participating carriers.

Integration into existing systems is made straightforward and non-intrusive with CodeB's wide range of APIs such as CLI, REST, Web Services, and Web Sockets. An example of this is our "CodeB distributed SIP Proxy" which utilizes these APIs. You can also add support with minimal intervention into existing systems such as Asterisk.

CodeB distributed SIP Proxy

The CodeB distributed SIP Proxy is a high-performance Session Initiation Protocol (SIP) stateless proxy designed for distributed routing and SIP signaling sanitizing. It provides many features including SIP trunk aggregation, name resolution, routing, load balancing, scalability, and high availability.


  • SIP signaling sanitizing and normalization

  • SIP trunk aggregation

  • Protocol Translator TCP <-> UDP

  • Encryption Gateway SSL <-> nonSSL

  • Stir/Shaken Header analyzer

  • Real-time CBAN Fraud Mitigation integration

  • Small footprint of less than 100kb

  • 100% managed code

  • Plugin APIs to extend features with own managed code

  • Integration with CodeB SMPP Gateway/Proxy

  • Standalone SDK as .net library available

  • SIP VPN built-in

  • Optional integration into CodeB Identity Services can combine trunks and lines with strong identities

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