However, in all those apps: recipients are looked up by phone number or email. That takes time and prevents you from sending your message until you hear back. For example, in Keybase chat, I can simply use my Hacker News name, malgorithms, as my secure address; no phone number or email needed. Since your Keybase app actually checks the proof for you, it's not "TOFU" (trust on first use) like other chats use. If wanted to be evil and trick you, they would have to trick everyone. Everyone you know on social media now has an encrypted inbox waiting for them. Because I follow him, I can think of him as "patrick" -- a single consolidated identity -- instead of the other disparate ways I know him.
This isn't just two-factor auth with server trust.If you’re experiencing problems with chat, the Xbox Live service may be down.Check for service alerts at Xbox Live Status or see if there's an Xbox Live service alert at the top of this page.That is, assuming they didn't also steal the messages from the device, when they stole the key. Apps with FS on all messages Compromise 2 is flat-out horrible because it violates an implicit social contract.Unless you ask your friends first for permission, then backing up a Forward Secrecy chat is the crypto equivalent of screengrabbing a Snapchat.