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Cryptography: A Brief History

Cryptography: A Brief History. Brian J. Harman. Beginnings. Hieroglyphic Alterations Hidden Writings Scytale. Caesar Cipher. First Substitution Cipher ABCDEFGHIJKLMNOPQRSTUVWXYZ DEFGHIJKLMNOPQRSTUVWXYZABC The quick brown fox jumped over the lazy dog

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Cryptography: A Brief History

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  1. Cryptography: A Brief History Brian J. Harman

  2. Beginnings • Hieroglyphic Alterations • Hidden Writings • Scytale

  3. Caesar Cipher • First Substitution Cipher ABCDEFGHIJKLMNOPQRSTUVWXYZ DEFGHIJKLMNOPQRSTUVWXYZABC The quick brown fox jumped over the lazy dog Wkhtxmfneurzqiramxpshgryhuwkhodcbgrg

  4. Arab Cryptanalysis • 400,000,000,000,000,000,000,000,000 combinations • Frequency analysis

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