• 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.