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(a) Describe DES encryption with a block diagram and brief steps.
(b) How does triple DES improve security. What is the effective key length of triple DES? How can 3DES be compatible with DES?
(c) Describe a one way hash function and give an example. Give essential properties of the hash functions.
(d) Define message authentication. Explain MAC.
(e) Give three known attacks on AES encryption.
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Hybrid Cryptography Systems This makes use of different cryptography systems. Except digital certificates, pure asymmetric key encryption is not used extensively. Asymmetric enc
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QUESTION (a) Describe the two possible configurations for 3DES (b) What is the main disadvantage of 3DES? (c) Why are most modern symmetric algorithm block ciphers? (d
FRAGMENTATION Fragmentation information is kept in different extension header. Every fragment has base header and fragmentation header. Whole datagram including original hea
What are the main differences between TCP/IP vs OSI?
LEGAL, ETHICAL AND PROFESSIONAL ISSUES To minimize liabilities and reduce risks, information security practitioner should: • to understand current legal environment • to s
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