Fourthly, scanning for known, thus old material does not help identify and rescue victims, or prevent child sexual abuse. It will actually make safeguarding victims more difficult by pushing criminals to secure, decentralised communication channels which are impossible to intercept even with a warrant.
This point is huge, and on its own explains why half baked compromises are worthless.
The criminals will use banned chat apps, while innocent people get their messages read.
Your first mistake was assuming it’s an attempt in good faith.
Well that’s the point, catching CSAM is just a very convenient excuse. Once that’s through, it will just be a matter of extending it to terrorism. Then you can declare anyone a terrorist and bam you have free reign to monitor anyone you want.
Lol guess we can kiss post-quantum TLS goodbye.
This is going to have catastrophically negative effects for the internet in general. And, as others have said, actual bad actors will just keep using the most advanced encryption available anyways. This only makes the vast majority of internet users less secure and easier targets for exploitation.
