These three ciphers can operate of ______ of plaintext and cipher text.

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These three ciphers can operate of ______ of plaintext and cipher text.

1.128 bit blocks

2.64 bit blocks

3.256 bit blocks

4.156 bit blocks

Posted Date:-2022-05-25 01:35:43

More MCQS Questions and answers

  1. A cryptographic hash function has variable output length.
  2. A set of numbers is called as super increasing if
  3. CDMA rejects
  4. CDMA uses
  5. Cipher system can be solved effectively by statistically using
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  7. Encryption transformations are known as
  8. Euler’s totient function is determined by
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  11. For n input bits the number of substitution patterns are
  12. Frequency planning is very essential in
  13. In a trapdoor function, the functions are easy to go in
  14. In cipher feedback method, encryption is done on
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  16. In public key cryptosystem _____ keys are used for encryption and decryption.
  17. In public key cryptosystem which is kept as public?
  18. In stream encryption, the key sequence repeats itself.
  19. In this Merkle Hellman method same key is used for encryption and decryption.
  20. In transposition, the plaintext letters are
  21. In which method, key-stream is generated independently?
  22. Knapsack problem can be solved by
  23. Merkle hellman is a symmetric cryptosystem.
  24. PGP offers _____ block ciphers for message encryption.
  25. PGP system uses
  26. Pretty good privacy (PGP) security system uses
  27. Pretty good privacy program is used for
  28. Private key algorithm is used for _____ encryption and public key algorithm is used for _____ encryption.
  29. Processing gain is the ratio of message bandwidth to signal bandwidth.
  30. Public key cryptosystem is also known as
  31. Public key cryptosystem is used for the encryption of
  32. Public key cryptosystem uses same key for both encryption and decryption.
  33. Some advantages of spread spectrum are
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  36. The substitution of the letters are done
  37. These three ciphers can operate of ______ of plaintext and cipher text.
  38. What is the key size allowed in PGP?
  39. Which algorithm can be used to sign a message?
  40. Which algorithm is used for public key encryption?
  41. Which are called the block ciphers?
  42. Which block cipher has key length of 128 bits?
  43. Which has a key length of 128 bits?
  44. Which is better for avoiding jamming?
  45. Which is more bandwidth efficient?
  46. Which is more simpler to implement?
  47. Which is more suitable when large number of transmitters are used?
  48. Which operation is used in encryption using IDEA?
  49. Which should be kept as a secret in public key cryptosystem?
  50. Which uses orthogonal codes?
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