Cryptography & Network Security Part 1/5 | William Stallings | Secure Communication Essentials 🔐

Introduction and Classic Encryption Techniques
OSI security architecture, Security attacks – Passive attacks, Active attacks, Security services- Authentication, Access Control, Data Confidentiality, Data integrity, Nonrepudiation, Availability service. Model for network security. Symmetric cipher model, Cryptography, Cryptoanalysis, Substitution techniques- Hill Cipher, One time pad, Transposition Techniques



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