Q106) In cryptography, what is cipher?

A. algorithm for performing encryption and decryption

B. encrypted message

C. both (a) and (b)

D. none of the mentioned

Answer : A

Q107) In asymmetric key cryptography, the private key is kept by:

A. sender

B. receiver

C. sender and receiver

D. all the connected devices to the network

Answer : B

Q108) Which one of the following algorithm is not used in asymmetric-key cryptography?

A. RSA algorithm

B. diffie-hellman algorithm

C. electronic code book algorithm

D. none of the mentioned

Answer : C

Q109) In cryptography, the order of the letters in a message is rearranged by:

A. transpositional ciphers

B. substitution ciphers

C. both (a) and (b)

D. none of the mentioned

Answer : A

Q110) What is data encryption standard (DES)?

A. block cipher

B. stream cipher

C. bit cipher

D. none of the mentioned

Answer : A

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