Question 21 : Encryption in Vigenere cipher is done using _________
1. vigenere formula
2. vigenere cycle
3. vigenere square
4. vigenere addition
5.
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Question 22 : Vigenere cipher is an example of ______________
1. mono-alphabetic cipher
2. poly-alphabetic cipher
3. transposition cipher
4. additive cipher
5.
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Question 23 : What is the meaning of cipher in cryptography?
1. an algorithm that performs encryption
2. an algorithm that generates a secret code
3. an algorithm that performs encryption or decryption
4. a secret code
5.
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Question 24 : In which of the following cipher the plain text and the ciphered text does not have same number of letters?
1. affine cipher
2. hill cipher
3. columnar cipher
4. additive cipher
5.
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Question 25 : Poly alphabetic cipher harder to decipher than mono alphabetic cipher.
1. true
2. false
3.
4.
5.
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Question 26 : Which of the following is a type of traditional cipher?
1. transportation cipher
2. transposition cipher
3. transforming cipher
4. translating cipher
5.
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Question 27 : Which of the following is not a type of poly alphabetic cipher?
1. Rotor cipher
2. Hill cipher
3. One time pad cipher
4. Affine cipher
5.
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Question 28 : Which of the following correctly defines poly alphabetic cipher?
1. a substitution based cipher which uses multiple substitution at different positions
2. a substitution based cipher which uses fixed substitution over entire message
3. a transposition based cipher which uses multiple substitution at different positions
4. a transposition based cipher which uses fixed substitution over entire message
5.
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Question 29 : Which of the following is a type of substitution cipher?
1. poly alphabetic cipher
2. transposition cipher
3. columnar cipher
4. rail fence cipher
5.
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Question 30 : Which of the following ciphers are created by shuffling the letters of a word?
1. rotor cipher
2. rail fence cipher
3. vigenere cipher
4. hill cipher
5.
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