Re:FBI Recovers WhatsApp, Signal Data Stored on Michael Cohe...
by reitanqild on Saturday June 16, 2018 @05:26PM
(#17329526)
Last I checked it was really easy to get data out of a WhatsApp backup.
No special skills needed except running locating the file, running a command and connecting using SQLite or something.
In any case you are right that if you can restore an "encrypted" backup onto a fresh phone without any info from the old one, then all the bits necessary to do are held by parties who can be legally compelled to give them up.