CYINS

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

............ is the science and art of transforming message s to make them secure and immune to attacks.

• Cryptography

• Cryptoanalysis

• Either(a)or(b)

• neither(a)or(b)

The ............ is the original message before transformation.

• Ciphertext

• Plaintext

• Secret-text

• None of the above

The ............ is the message after transformation

• Ciphertext

• Plaintext

• Secret-text

• None of the above

The shift cipher sometimes referred to as the.

• Shift modulus

• cipher modulus

• caeser cipher

• None of these

Which type of encryption uses the same key for both encryption and decryption?

• Asymmetric encryption

• Hashing

• Symmetric encryption

• None of the above

The plaintext encrypts to different cipher text with different keys

• True

• False

Cipher in cryptography is –

• Encrypted message

• Algorithm for performing encryption and decryption

• Both algorithm for performing encryption and decryption and encrypted message

• Decrypted message

When a hash function is used to provide message authentication, the hash function value is called to as:

• Message Field

• Message Score

• Message Leap

• Message Digest

What is the output of a cryptographic hash function means?

• A variable set of bits

• A fixed set of bits, derived from one-way mathematical operations

• An output which may be easily discovered by an adversary

• Outputs of such functions are of no importance