Subj : Re: CRYPTO-GRAM, April 15, 2022
To   : August Abolins
From : Warpslide
Date : Tue Jun 21 2022 10:15:18

 *** Quoting August Abolins from a message to Arelor ***

 AA> In Canada, the system was apparently difficult to forge since   the
 AA> "official" data was tied to a central database nationwide.

Yup, Canada used SMART Health Card QR codes to verify.  The data was signed 
with an Elliptic Curve key using the P-256 curve.

Signing Health Cards:
- Issuers sign Health Card VCs (Verifiable Credentials) with a signing key 
(private key)
- Issuer publish the corresponding public key 
- Wallets and Verifiers use the public key to verify Issuer signatures on 
Health Cards

Politics aside, the technolgy is pretty neat.  You can get all of the 
nitty-gritty details here:

https://spec.smarthealth.cards/


Of couse this will all be moot (at least here in Ontario) as the app used to 
verify these QR codes will stop working on Friday:

"The Verify Ontario app will no longer be available as of June 24, 2022. The 
app will not scan QR codes after this date."

https://covid-19.ontario.ca/verify-results


Jay

.... Money isn't everything, usually it isn't even enough

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