[MForster]

Thanks for pointing out the encryption. That changes things a bit, IMHO.

Would have been nice if the article explained a bit what is actually happening. The wikipedia article doesn't mention it either...

[garblegarble]

I've edited my comment to add a link to Apple's description of the service's approach: https://support.apple.com/en-gb/guide/security/sec6cbc80fd0/...