This change is likely because of the way the messages are stored by the applications, not because the FBI had to break any sort of encryption on them. WhatsApp and Signal store their messages in encrypted databases on the device, so an initial dump of the phone would have only provided a cryptographic blob. The key is required to decrypt the contents of such a database, and there are tools readily available to access the WhatsApp database on a PC.
Расходимся, там алгоритмическая закладка. Так что, мамкины конспирологи, фильтруйте базар, даже в супер-дупер сикретном мессенджере.
