PKI solves other problems but not this one, where people wanted a valid test but the testing facility cheated. Invalidating historical tests isn’t particularly

PKI solves other problems but not this one, where people wanted a valid test but the testing facility cheated. Invalidating historical tests isn’t particularly valuable. After they’re more than a few days old the result rarely matter nor be subject to scrutiny. Notifying affected patients is important but they did that just fine with PKI