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Cryptography

Applied

TLS, PGP, Signal, real systems.

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  • 01·220 XP
    TLS 1.3 Handshake
    One RTT, key shares, encrypted extensions, Finished.
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  • 02·230 XP
    Certificate Chains
    X.509 trust paths, hostname matching, revocation.
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  • 03·250 XP
    Signal Double Ratchet
    X3DH, symmetric chain, DH step, forward secrecy.
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  • 04·210 XP
    PGP & Web of Trust
    Hybrid encryption, trust paths, why PGP lost.
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  • 05·240 XP
    Noise & HPKE
    Patterns, handshake tokens, hybrid public-key encryption.
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