The Guardian ran a sensational story on Friday claiming a backdoor was discovered in WhatsApp, enabling intelligence agencies to snoop on encrypted messages. Gizmodo followed up saying it's no backdoor at all, but reasonable, intended behavior. So what's really going on here? The lost phone, lost message dilemma The issue at question is WhatsApp's answer to the question of what applications should do when someone's phone number changes (or they reinstall their app, or switch phones). Suppose Alice sends a message to Bob encrypted with Bob's key K1.
Former Bob Jonkman -- Please use the new server at https://gs.jonkman.ca
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