The company behind the Signal clone used by at least one Trump administration official was breached earlier this month. The hacker says they got in thanks to a basic misconfiguration.
works in almost exactly the same way as Signal, except that it also archives copies of all the messages passing through it, shattering all of its security guarantees.
Pretty sure Signal does that as well, which is not a security issue.
Pretty sure Signal does that as well, which is not a security issue.