100+ Symmetric block cipher processes PowerPoint (PPT) Presentations, Symmetric block cipher processes PPTs

Symmetric block cipher processes - PowerPoint PPT Presentation

Cryptography

Cryptography. Cryptography is the technique of secret writing. A cipher is a method of secret writing. The purpose is to convert an intelligible message, referred to as plaintext, into apparently random nonsense text, referred to as ciphertext.

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Claude Shannon and Substitution-Permutation Ciphers

Claude Shannon and Substitution-Permutation Ciphers. in 1949 Claude Shannon introduced idea of substitution-permutation (S-P) networks modern substitution-transposition product cipher these form the basis of modern block ciphers

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Symmetric block cipher processes - PowerPoint PPT Presentation

Cryptography

Claude Shannon and Substitution-Permutation Ciphers