1. source?
2. It really wasn't obvious because you failed to link "vaccinated" with "not exponentially contagious".
>What does encryption have anything to do with vaccination and vaccination passports?
In the previous comment you basically made the argument that the measures are justified because they're not "interventions against social freedoms, rather an intervention to prevent a public service from being DDoSed". I just took that argument to its logical conclusion. Law enforcement resources are stretched pretty thin, right? Why not give them a helping hand as well by allowing them to eavesdrop on everyone's communications? After all, it's not an intervention to decrease public privacy, it's an intervention to prevent law enforcement resources from being DDoSed.