The first time I saw the message “Your messages are now encrypted” on WhatsApp my reaction was “Yes, but it’s worthless if you keep a copy of the key”.
If the end user isn’t able to create the key by themselves, it’s most likely useless.
Imagine you rent a flat and the owner is Facebook, who keeps a copy of the key and let everyone in who pays some money.
The first time I saw the message “Your messages are now encrypted” on WhatsApp my reaction was “Yes, but it’s worthless if you keep a copy of the key”.
If the end user isn’t able to create the key by themselves, it’s most likely useless.
Imagine you rent a flat and the owner is Facebook, who keeps a copy of the key and let everyone in who pays some money.