The BC covid passport verifier apps are open source - https://github.com/bcgov/BCVAX-Android https://github.com/bcgov/BCVAX-Android and https://github.com/bcgov

The BC covid passport verifier apps are open source - https://github.com/bcgov/BCVAX-Android https://github.com/bcgov/BCVAX-Android and https://github.com/bcgov/BCVAX-iOS https://github.com/bcgov/BCVAX-iOS respectively. There is no "user" passport app - the BC Health Gateway website generates a standard (https://smarthealth.cards/ https://smarthealth.cards/) QR code that you can save on phone, or print. The QR codes are signed, but not encrypted - you can dump the contents to verify the payload contains only what's described. Because it's just signature validation of the payload, they can be verified offline.