JNTU
JNTU B.Tech IV INFORMATION SECURITY Previous Question Paper (May/June - 2019 - R15)
Part A is compulsory. Part B consists of 5 Units. Answer any one full question from each unit.
Part A
Define steganography.
Answer
Steganography is the art and science of hiding information within other non-secret data (the cover medium) such as images, audio, or text files, so that the very existence of the communication remains concealed from unauthorized observers.
Differentiate between transposition cipher and substitution cipher.
Answer
A substitution cipher replaces each plaintext character with another character, symbol, or number, maintaining the original order of characters. In contrast, a transposition cipher rearranges the positions of the existing plaintext characters according to a specific rule or pattern without changing the characters themselves.
Define linear cryptanalysis.
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Define the principle elements of a public key cryptosystem.
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Give the requirements for message authentication.
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Evaluate what are the security services provided by digital signature.
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Give the applications of IPSecurity.
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Examine whether ESP includes a padding field.
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List three classes of intruder.
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Discuss about password management.
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Part B
Apply Vigenere cipher; encrypt the word “explanation” using the key “leg”.
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Explain in detail about various security mechanisms.
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Evaluate using Diffie-Hellman key exchange technique. Users A and B use a common prime q=11 and a primitive root alpha=7. (a) If user A has private key XA=3. What is A’s public key YA? (b) If user B has private key XB=6. What is B’s public key YB? (c) What is the shared secret key?
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Explain the various types of block cipher design principles.
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Explain the process of deriving eighty 64-bit words from 1024 bits for processing of a single blocks and also discuss single round function in SHA-512 algorithm. Show the values of W16, W17, W18 and W19.
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Compare and generalize the features of SHA and MD5 algorithm. Formulate the objectives of HMAC candidate security features.
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Describe about the architecture of IP security.
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Analyze the Cryptographic algorithms used in S/MIME and Explain S/MIME certification processing.
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Explain the design principles of firewall.
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Explain about secure electronic transaction.
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List the different protocols of SSL. Explain in detail Handshake protocol.
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