If there ever was a big breach of vax pass personal data, from a government or a government contracted company in the US.

That would give Tucker and others actual real ammunition against the passports.

Edit to add, I wouldn't put it past the Q-publicans to hire ninjas, or use Putin's trolls, to actually work overtime to find a way to do this simply to cause more problems for Biden.

it was strictly a private company taking advantage of the vaccination passport requirements across Canada. The Alberta government has it's own website where Albertans could go to get proof of their vaccinations if they lost their original paper ones or wanted a drivers license-sized proof of vaccination but does not offer an official app.

Phoenix payroll system, an IBM product adopted in Canada in 2009:

https://www.itworldcanada.com/article/phoenix-payroll-system-timeline-of-the-governments-problems/396407

"It was one of the biggest IT boondoggles in Canadian government history, and it’s still going. The Phoenix payroll system was part of a federal government investment in consolidating and modernizing government processes. Following a failed implementation, tens of thousands of government employees were left out of work, and the Liberal and Conservative governments were pointing the finger at each other.

It’s been a long, hard journey for Public Services and Procurement (PSPC), which set up the system with IBM Corp. and has been facing criticism ever since. Here’s how it all went down."

much more at link for those with an interest

government-contracted site, it was a completely private company with no affiliation with either the federal or provincial governments.

The government scandal re the IBM product was a completely different kettle of fish and both the Liberal and Con governments screwed up on this one.

the private sector to get it right.

especially these days.

I was depressed for months after the terrible rollout of the ACA (Obamacare), with a Canadian company contracted to create the website.

Every time that I tried to enroll, the website was obviously being hacked. I'd answer personal questions, double- and triple-checking them, and the answers were completely different by the time that I reached the "summary" at the end. (Which always made my eligibility impossible, of course.) And it happened again and again, for weeks.

CGI Federal:
https://www.washingtonpost.com/news/wonk/wp/2013/10/16/meet-cgi-federal-the-company-behind-the-botched-launch-of-healthcare-gov/