Trust in Telecommunications

CST-GA is the national governance authority tasked to direct and oversee the STIR/SHAKEN Policy Administrator and Certificate Authority for Canada.


Ensuring Integrity & Security

Re-establishing Trust

Contributing to the successful implementation of the STIR/SHAKEN framework will allow Canadians to once again answer the phone without apprehension.

A Unified Voice

Bringing together collective agreement will allow for a quicker and more proactive approach for implementing recommendations.

Knowledge. Experience.

The CST-GA’s team has decades of proven leadership and support to the industry – negotiating, building consensus and providing expert business guidance.

See if you are eligible to join


How It Works

STIR (Secure Telephony Information Revisited) is a a technical standard that allows telecommunications service providers (TSPs) to certify the identity of callers. SHAKEN (Signature-based Handling of Asserted information using toKENs) is the framework for the implementation of STIR into providers’ networks. Simply put, STIR defines how you could implement the protocol, while SHAKEN documents how you will implement the protocol.




FCC Approves New Rules to Encourage Blocking of Illegal and Unwanted Robocalls to Protect Consumers

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CRTC Approves Application by Bell Canada and Affiliates to Block Certain Fraudulent and Scam Voice Calls on a Trial Basis

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Pallone-Thune Telephone Robocall Abuse Criminal Enforcement and Deterrence (TRACED) Act

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Media Coverage

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TELUS Hosts CRTC and FCC Exchange to Demonstrate Call Validation Technology

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CRTC Calls on Telecoms to Adopt New Tool to Tackle “Spoofed” Phone Calls

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Become a Member

Any Canadian Carrier, with a current year DCS and direct access to Canadian Telephone Numbers can participate in the call authentication scheme.

Become a Certification Authority

Submit your Certificate Practice Statement (CPS) today and start the process to becoming an authorized Certification Authority.