Which of the following is the disadvantage of asymmetric cryptography?

• A. No need of key distribution
• B. Security
• C. Using digital signatures
• D. Used to decrypt small messages

A sender encrypts a message using recipient’s public key in public key cryptography?

• A. True
• B. False
• C.
• D.

Which of the following equation is correct in case of hash function, where M = input, N = hash value, H = hash function?

• A. H = m(n)
• B. M = h(n)
• C. N = h(m)
• D. N = m(h)

What is/are the property(s) of a good hash function in case of producing outputs for set of inputs?

• A. Apparently random hash values
• B. Evenly distributed hash values
• C. Apparently random and evenly distributed values
• D. Evenly distributed but not apparently random values

What is the core objective of the hash functions in producing hash values?

• A. Integrity
• B. Authenticity
• C. Confidentiality
• D. Security

What is the name for hash functions that are used in security applications?

• A. Secured hash function
• B. Cryptographic hash function
• C. Security hash function
• D. Crypt-analysis hash function

Which of the following application in which hash function is employed, refers hash value as message digest?

• A. Message authentication
• B. Virus detection
• C. Digital signatures
• D. One-way password file

What is the other name for key hash function, which is used in message authentication?

• A. Message administration control
• B. Message authentication code
• C. Message administration code
• D. Message authentication control

What is Ci in the bit-by-bit XOR hash function, that is Ci = bi1 + bi2.….. + bim

• A. Number of n bit blocks
• B. Ith bit of the hash code
• C. Ith bit in jth block
• D. Xor operation

When can we detect a collision if the hash values are same for two inputs, that is H(x) = H(y)?

• A. When x < y
• B. When x > y
• C. When x = y
• D. When x != y