Information and Network Security MCQs with answers Page - 8

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Q. Conventional cryptography is also known as _____________ or symmetric-key encryption.

  • (A) Secret-key
  • (B) Public key
  • (C) Protected key
  • (D) Primary key

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Q. Data Encryption Standard is an example of a _____________ cryptosystem.

  • (A) Conventional
  • (B) Public key
  • (C) Hash key
  • (D) Asymmetric-key

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Q. _______ Cryptography deals with traditional characters, i.e., letters & digits directly.

  • (A) Latest
  • (B) Asymmetri
  • (C) C Classic
  • (D) Modern

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Q. ____________ Cryptography operates on binary-bit series and strings.

  • (A) Modern
  • (B) Classi
  • (C) C Traditional
  • (D) Primitive

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Q. ____________ is a mono-alphabetic encryption code wherein each & every letter of plaintext is replaced by another letter in creating the cipher-text.

  • (A) Polyalphabetic Cipher
  • (B) Caesar Cipher
  • (C) Playfair Cipher
  • (D) Monoalphabetic Cipher

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Q. ________ is the concept that tells us about the replacement of every alphabet by another alphabet and the entire series gets ‘shifted’ by some fixed quantity.

  • (A) Rolling Cipher
  • (B) Shift Cipher
  • (C) Playfair Cipher
  • (D) Block Cipher

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Q. In Playfair cipher, at first, a key table is produced. That key table is a 5 by 5 grid of alphabets which operates as the key to encrypt the plaintext.

  • (A) Rolling Cipher
  • (B) Shift Cipher
  • (C) Playfair Cipher
  • (D) Block Cipher

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Q. ______________ employs a text string as a key that is implemented to do a series of shifts on the plain-text.

  • (A) Shift Cipher
  • (B) Block Cipher
  • (C) Playfair Cipher
  • (D) Vigenere Cipher

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Q. The ________________ has piece of the keyword that has the same length as that of the plaintext.

  • (A) One-time pad
  • (B) Hash functions
  • (C) Vigenere Cipher
  • (D) Block Cipher

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Q. In _______________ the plain-text is processed 1-bit at a time & a series of actions is carried out on it for generating one bit of cipher-text.

  • (A) Vigenere Cipher
  • (B) Block Cipher
  • (C) Stream cipher
  • (D) One-time pad

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