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## Vigenere Cipher Multiple choice Questions and Answers (MCQs)

Question 1 [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER] |

What is the meaning of cipher in cryptography?

an algorithm that performs encryption | |

an algorithm that generates a secret code | |

an algorithm that performs encryption or decryption | |

a secret code |

Question 1 Explanation:

Cipher is an algorithm for performing encryption or decryption. In cryptography, a set of defined steps are followed to generate ciphers. These are necessary to prevent data breach.

Question 2 [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER] |

Vigenere cipher is an example of .....

mono-alphabetic cipher | |

poly-alphabetic cipher | |

transposition cipher | |

additive cipher |

Question 2 Explanation:

Vigenere cipher is a substitution cipher. It falls under the category of poly alphabetic cipher as it uses multiple substitution at different positions in order to cipher the plain text.

Question 3 [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER] |

Encryption in Vigenere cipher is done using .....

vigenere formula | |

vigenere cycle | |

vigenere square | |

vigenere addition |

Question 3 Explanation:

Encryption of plain text using vigenre cipher is done by making use of vigenere table. It is also known as vigenere square.

Question 4 [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER] |

Which of the following correctly defines poly alphabetic cipher?

a substitution based cipher which uses multiple substitution at different positions | |

a substitution based cipher which uses fixed substitution over entire message | |

a transposition based cipher which uses multiple substitution at different positions | |

a transposition based cipher which uses fixed substitution over entire message |

Question 4 Explanation:

Poly alphabetic cipher is a type of substitution cipher. It uses multiple substitution at different positions in order to cipher the plain text.

Question 5 [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER] |

Which of the following is not a type of poly alphabetic cipher?

Rotor cipher | |

Hill cipher | |

One time pad cipher | |

Multiplicative cipher |

Question 5 Explanation:

In poly alphabetic cipher each symbol of plain text is replaced by a different cipher text regardless of its occurrence. Out of the given options only multiplicative cipher is not a poly alphabetic cipher.

There are 5 questions to complete.