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The cryptography behind passkeys

When most people think of cryptography, the first thing they typically think of is encryption: keeping information confidential. But just as important (if not more) is authenticity: ensuring that information is really coming from an authentic source. When you visit a website, the server typically proves its identity through a Transport Layer Security (TLS) certificate authenticated by the Web Public Key Infrastructure (PKI). Passwords are the traditional solution for user authentication, but the...

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