Question 61 : ElGamal encryption system is
1. symmetric key encryption algorithm
2. asymmetric key encryption algorithm
3. not an encryption algorithm
4. none of the mentioned
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Question 62 : Voice privacy in GSM cellular telephone protocol is provided by
1. A5/2 cipher
2. b5/4 cipher
3. b5/6 cipher
4. b5/8 cipher
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Question 63 : Which one of the following is a cryptographic protocol used to secure HTTP connection?
1. stream control transmission protocol (SCTP)
2. transport layer security (TSL)
3. explicit congestion notification (ECN)
4. resource reservation protocol
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Question 64 : Cryptanalysis is used
1. to find some insecurity in a cryptographic scheme
2. to increase the speed
3. to encrypt the data
4. none of the mentioned
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Question 65 : What is data encryption standard (DES)?
1. block cipher
2. stream cipher
3. bit cipher
4. none of the mentioned
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Question 66 : In cryptography, the order of the letters in a message is rearranged by
1. transpositional ciphers
2. substitution ciphers
3. both transpositional ciphers and substitution ciphers
4. none of the mentioned
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Question 67 : Which one of the following algorithm is not used in asymmetric-key cryptography?
1. rsa algorithm
2. diffie-hellman algorithm
3. electronic code book algorithm
4. none of the mentioned
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Question 68 : In asymmetric key cryptography, the private key is kept by
1. sender
2. receiver
3. sender and receiver
4. all the connected devices to the network
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Question 69 : In cryptography, what is cipher?
1. algorithm for performing encryption and decryption
2. encrypted message
3. both algorithm for performing encryption and decryption and encrypted message
4. none of the mentioned
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Question 70 : Which routing protocol implements the diffusing update algorithm?
1. IS-IS
2. IGRP
3. EIGRP
4. OSPF
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