On Verifying Identity Using Cryptography
One of the most important uses of cryptography these days is verifying the identity of the other side of a digital conversation. That conversation could be between two people using OTR-encrypted IM, a web browser showing a bank website, a Debian Developer uploading a package to the Debian build server, an ssh client logging into an ssh server, and on and on. In all of these cases, cryptography is used to ensure that the software is indeed receiving replies from the expected entity.
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