I think at best you could argue the people who wrote the law didn't actually know what seized means, which is more worrying.

But i would say that taking public keys doesn't fulfill the "removes property from an individual's possession" in the law.cornell.edu link. There is no way to 'remove property from an individual's possession" while "leaving property in an individual's possession" at the same time. And if you are have done the second one of those things then you have failed to do the first.