Information Cyber Security Set 11 MCQs

Q1 | The procedure to add bits to the last block is termed as

decryption

hashing

tuning

padding

Q2 | Cryptanalysis is used

to find some insecurity in a cryptographic scheme

to increase the speed

to encrypt the data

to make new ciphers

Q3 | Conventional cryptography is also known as or symmetric-key encryption.

secret-key

public key

protected key

primary key

Q4 | is the art & science of cracking the cipher-text without knowing the key.

cracking

cryptanalysis

cryptography

crypto-hacking

Q5 | In cryptography, what is cipher?

algorithm for performing encryption and decryption

encrypted message

both algorithm for performing encryption and decryption and encrypted message

decrypted message

Q6 | In asymmetric key cryptography, the private key is kept by __________

sender

receiver

sender and receiver

all the connected devices to the network

Q7 | In cryptography, the order of the letters in a message is rearranged by __________

transpositional ciphers

substitution ciphers

both transpositional ciphers and substitution ciphers

quadratic ciphers

Q8 | Cryptanalysis is used __________

to find some insecurity in a cryptographic scheme

to increase the speed

to encrypt the data

to make new ciphers

Q9 | Which one of the following is a cryptographic protocol used to secure HTTP connection?

stream control transmission protocol (sctp)

transport layer security (tls)

explicit congestion notification (ecn)

resource reservation protocol

Q10 | Voice privacy in GSM cellular telephone protocol is provided by _______

a5/2 cipher

b5/4 cipher

b5/6 cipher

b5/8 cipher

Q11 | ElGamal encryption system is __________

symmetric key encryption algorithm

asymmetric key encryption algorithm

not an encryption algorithm

block cipher method

Q12 | Cryptographic hash function takes an arbitrary block of data and returns _________

fixed size bit string

variable size bit string

both fixed size bit string and variable size bit string

variable sized byte string

Q13 | In the above figure from left to right, the correct order of the shaded levels are

network level, application level, transport level

application level, network level, transport level

transport level, application level, network level

network level, transport level, application level

Q14 | In the above figure, which of the above shaded block is transparent to end users and applications?

ip/ipsec

ssl

kerberos

s/mime

Q15 | In terms of Web Security Threats, “Impersonation of another user” is a Passive Attack.

TRUE

FALSE

Q16 | Which one of the following is not a higher –layer SSL protocol?

alert protocol

handshake protocol

alarm protocol

change cipher spec protocol

Q17 | In the SSL Protocol, each upper layer message if fragmented into a maximum of __________ bytes.

216

232

214

212

Q18 | The full form of SSL is

serial session layer

secure socket layer

session secure layer

series socket layer

Q19 | Which protocol is used to convey SSL related alerts to the peer entity?

alert protocol

handshake protocol

upper-layer protocol

change cipher spec protocol

Q20 | Which protocol consists of only 1 bit?

alert protocol

handshake protocol

upper-layer protocol

change cipher spec protocol

Q21 | Which protocol is used for the purpose of copying the pending state into the current state?

alert protocol

handshake protocol

upper-layer protocol

change cipher spec protocol

Q22 | In the alert protocol the first byte takes the value 1 or 2 which corresponds to _________ and _________ respectively.

select, alarm

alert, alarm

warning, alarm

warning, fatal

Q23 | Pretty good privacy (PGP) security system uses

public key cryptosystem

private key cryptosystem

public & private key cryptosystem

none of the mentioned

Q24 | Data compression includes

removal of redundant character

uniform distribution of characters

removal of redundant character & uniform distribution of characters

none of the mentioned

Q25 | PGP offers _____ block ciphers for message encryption.

triple-des

cast

idea

all of the mentioned