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Introduction: OSI Security Architecture, Security attacks, ,Security Services, Security
Mechanisms, Model for Network Security, Fundamentals of Abstract Algebra : Groups, Rings,
Fields, Modular Arithmetic, Euclidean Algorithm, Finite Fields of the form GF(p),Polynomial
Arithmetic, Finite Fields of the form GF(2n),Classical Encryption techniques, Block Ciphers and
Data Encryption Standard.