7. "So, encrypted messages *are* secure." In response to In response to 0
but the devices you use to send and receive them are not.
so if the FBI or whoever gets your phone, or the phone of the person you're talking to, and the messages are there....guess what your encrypted messages are now unencrypted messages.
also, even without that, just the metadata -- which even signal can't really hide -- is something the feds can always get, and if they know who you were talking to, when and how much, they can figure out the rest.