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final-topics - – Prime Numbers and Factorization –...

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Lign 17, Winter 2011: Topics Covered What is Steganography/Cryptography? Transposition Ciphers Example: Rail Fence Ciphers Substitution Ciphers: Making and Breaking Them Monoalphabetic * Caesar Shift Codes, Nomenclators Monoalphabetic with Keyphrase Monoalphabetic with Homophones Polyalphabetic: The Vigenere Cipher One-time Pad Ciphers Book Ciphers Binary representations (e.g., ASCII) Math in binary An example binary transposition cipher An example binary substitution cipher Public-Key Cryptography The Key Distribution Problem / Padlock Metaphor One-way Functions Modular Arithmetic
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The Diffie-Hellman Protocol
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Unformatted text preview: – Prime Numbers and Factorization – Asymmetric Ciphers (vs. Symmetric) – RSA • Data Compression – Fixed-length and variable-length codes – Prefix-free codes – Huffman coding – Lossless vs. Lossy compression; compression ratios • Randomness (vs. Predictability) – The Spectral Tests for Randomness • Error-Detecting (and Correcting) Codes – Checksum Systems for Binary Messages – Credit Card Codes / Luhn Algorithm – Universal Product Codes (UPC) – ISBN Codes – Error-Correcting Codes / Hamming(7,4) – Analysis of Errors (Caught and Missed)...
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