unit i ccs

In cryptography, what is cipher?

• a) algorithm for performing encryption and decryption

• b) encrypted message

• c) both algorithm for performing encryption and decryption and encrypted message

• d) decrypted message

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

• a) transpositional ciphers

• b) substitution ciphers

• c) both transpositional ciphers and substitution ciphers

• d) quadratic ciphers

Cryptanalysis is used __________

• a) to find some insecurity in a cryptographic scheme

• b) to increase the speed

• c) to encrypt the data

• d) to make new ciphers

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

• a) Cracking

• b) Cryptanalysis

• c) Cryptography

• d) Crypto-hacking

The process of disguising plaintext in such a way that its substance gets hidden (into what is known as cipher-text) is called _________________

• a) cryptanalysis

• b) decryption

• c) reverse engineering

• 
  d) encryption

The method of reverting the encrypted text which is known as cipher text to its original form i.e. plain text is known as ________________

• a) cryptanalysis

• b) decryption

• c) reverse engineering

• d) encryption

Which of the following is not the primary objective of cryptography?

• a) Confidentiality

• b) Data Integrity

• c) Data Redundancy

• d) Authentication