Can you provide documentation demonstrating this requirement in the United States? It is widely understood that no such requirement exists.
There's no need to compromise with any requirement, this was entirely voluntary on Apple's part. That's why people were upset.
> I can't believe how uninformed
Oh the irony.
PROTECT Act of 2003 - Details CSAM materials as being illegal which is enforced by FBI + ICE.
Also NCMEC which is a non-profit created by the US government that actively works in this area.
There is absolutely no such legal requirement. If there were one it would constitute an unlawful search.
The reason the provider scanning is lawful at all is because the provider has inspected material voluntarily handed over to them, and through their own lawful access to the customer material has independently and without the direction of the government discovered what they believe to be unlawful material.
The cryptographic functionality in Apple's system was not there to protect the user's prviacy, the cryptographic function instead protected apple and their datasources from accountability by concealing the fingerprints that would cause user's private data to be exposed.