NPTEL Cyber Security and Privacy Week 8 Assignment Answer 2023

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NPTEL Cyber Security and Privacy Week 8 Assignment Solutions

NPTEL Cyber Security and Privacy Assignment Answers 2023

NPTEL Cyber Security and Privacy Week 8 Assignment Answer 2023

1. Which of the following terms describes the process of making and using codes to secure the transmission of information?

  • Algorithm
  • Cryptography
  • Steganography
  • Cryptanalysis
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2. What is term is used to describe a cryptographic method that incorporates mathematical operations involving both a public key and a private key to encipher or decipher a message?

  • Private-key encryption
  • Symmetric encryption
  • Advanced Encryption Standard (AES)
  • Asymmetric encryption
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3. A substitution cipher that incorporates two or more alphabets in the encryption process is called——————-

  • Monoalphabetic substitution
  • Block cipher substitution
  • Stream cipher substitution
  • Polyalphabetic substitution
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4. The current standard for the encryption of data, as specified by NIST ——— is based on the Rijndael algorithm, which was developed by Vincent Rijmen and Joan Daemen.

  • DES
  • RSA
  • AES
  • Message Digest
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5. True or False:
Nonrepudiation means that customers or partners can be held accountable for transactions, such as online purchases, which they cannot later deny.

  • True
  • False
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6. Limited-use symmetric keys for temporary communications during an online session is called

  • Session keys
  • One-time padding
  • AES
  • DES
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7. Match the following

NPTEL Cyber Security and Privacy Week 8 Assignment Answer 2023

Choose the correct answer

  • A-3, B-5, C-4, D-1, E-2
  • A-2, B-1, C-4, D-5, E-3
  • A-4, B-2, C-3, D-1, E-1
  • A-5, B-2, C-3, D-1, E-4
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8. Suppose that everyone in a group of N people wants to communicate secretly with the N-1 others using a symmetric key cryptographic system. Communication between any two persons should not be decodable by others in the group. The number of keys required in the system as a whole to satisfy the confidentiality requirement is

  • 2N
  • N(N-1)
  • N(N1)/2
  • (N-1)2
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9. Decrypt the following message if it was encrypted using a shift cipher with a shift of 3.
Message: NPTELINFORMATION

  • Q S W H O L Q I R U P W L R Q
  • Q S W H O L Q I T U P W L R Q
  • Q S W F O L Q I R V P W L R Q
  • Q S W H O L Q I R V P W L R Q
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10. ————security protocols are used to protect e-mail

  • SMTP
  • HTTPS
  • S/MIME, PEM, and PGP
  • Telnet
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11. What is the most popular encryption system used over the Web?

  • Diffie Hellman key exchange
  • RSA
  • Block cipher
  • DES
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Course NameCyber Security and Privacy
CategoryNPTEL Assignment Answer
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