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(i) Classify and briefly define types of cryptanalytic attacks based on what is known to theĪttacker. Describe: (i) Playfair cipher ii) Railfence cipher iii)Vignere cipher. Discuss the substitution Techniques and Transposition Techniques in detail. 
Security at Multiple levels and explain Security Policies.
(i)Define Security trends - Legal, Ethical and Professional Aspects of Security. Describe the differences between steganography and cryptography with example in details. Download Important Question from rejinpaul & also refer your friends!! Anna University Exams– Regulation 2017 Rejinpaul Unique Important Questions –BE/BTECH CS8792 Cryptography and Network Security PART B & PART C IMPORTANT QUESTIONS
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