Network Security Rizwan Rehman, CCS Cryptography • • • • • Introduction to Cryptography Substitution Ciphers Transposition Ciphers One-Time Pads Two Fundamental Cryptographic Principles Need for Security Some people who cause security problems and.

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Transcript Network Security Rizwan Rehman, CCS Cryptography • • • • • Introduction to Cryptography Substitution Ciphers Transposition Ciphers One-Time Pads Two Fundamental Cryptographic Principles Need for Security Some people who cause security problems and.