[sneak]

Google end-to-end encrypts Android backups. Apple does not end-to-end encrypt iCloud backups (on by default on every iOS device), and it serves as an effective cryptographic backdoor to the end-to-end encryption in iMessage by escrowing the keys (as well as the full message content and attachment history) to Apple each night, using Apple keys, which permits Apple (and by extension the FBI, without a warrant) to read every message sent or received by a device in such a default iCloud backup configuration, without ever touching that device.

They were going to fix this, but Apple Legal killed the project while it was underway. This was done at FBI request, according to Reuters' sources.

https://www.reuters.com/article/us-apple-fbi-icloud-exclusiv...