JAWAHARLAL NEHRU TECHNOLOGICAL UNIVERSITY HYDERABAD
JAWAHARLAL NEHRU TECHNOLOGICAL UNIVERSITY HYDERABAD B.Tech IV Year INFORMATION SECURITY Previous Question Paper (November/December - 2018 - R15)
Note: This question paper contains two parts A and B. Part A is compulsory which carries 25 marks. Answer all questions in Part A. Part B consists of 5 Units. Answer any one full question from each unit. Each question carries 10 marks and may have a, b, c as sub questions.
Part A
What are the principles of security?
Answer
The core principles of security, often referred to as the CIA triad, are Confidentiality (ensuring data is accessible only to authorized users), Integrity (ensuring data remains accurate and unaltered), and Availability (ensuring systems and data are accessible when needed).
Explain substitution techniques in security.
Answer
Substitution techniques are cryptographic methods where each element in the plaintext (character or bit) is mapped to another element in the ciphertext. Common examples include the Caesar cipher, which shifts letters by a fixed number of positions, and the Monoalphabetic cipher, where each letter is replaced by a corresponding letter from a scrambled alphabet.
Difference between block cipher and stream cipher.
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Write about cipher chaining (CBC) mode.
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What is the importance of hash function?
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Explain about bio metric authentication.
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What are the various applications of IP security?
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List out different types of MIME contents.
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What are the common techniques used to protect a password file.
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List out different types of virus.
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Part B
Explain in detail about security services.
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Explain about stereography.
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Explain different kinds of security approaches.
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Explain about encryption and decryption.
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Discuss about RC4 Algorithm.
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Explain about Diffie –Hellman key exchange technique.
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Briefly explain AES algorithm.
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Discuss about differential and linear cryptanalysis.
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Briefly explain X.509 Authentication services.
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Explain about HMAC algorithm with their structure.
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Explain about secure hash algorithm.
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Compare and contrast the key management in PGP and S/MIME.
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Explain the purpose of combining security associations in IP security and how is it perform.
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Discuss the architecture of IP security.
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Explain about key management techniques.
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Explain the operation of secure socket layer in detail.
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Discuss the requirements of web security.
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List and explain the major classes of intruders.
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Explain the life cycle of a Virus.
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