2. 科技
    3. Cryptography and Security 4-6

    Cryptography and Security 4-6

    科技2026-02-22  8

    目录

    Lecture 5:Advanced Encryption StandardShannon's ideaAES(Advanced)Conclusions Lecture 05: Modes of Operations for Block Ciphers

    Lecture 5:Advanced Encryption Standard

    Shannon’s idea

    diffusion（message和key参与、多用linear function）和confusion（complex、nonlinear function）和iteration of block cipher（迭代一个simple function多次）

    AES(Advanced)

    对称加密算法

    Conclusions

    • Simple • Symmetric and parallel structure • Flexible implementation • Secure against all known cryptanalytic attacks • Suitable modern processors • Suitable for smart cards (8-bit p

    Lecture 05: Modes of Operations for Block Ciphers

    • Electronic Codebook (ECB) • Cipher Block Chaining (CBC) • Cipher Feedback (CFB) • Output Feedback (OFB) • Counter mode (CTR) • Combining block ciphers

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