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Wednesday, January 10, 2018

Computer Networks 2014(2)



Which of the following are used to generate a message digest by the network security protocols?

(P) RSA
(Q) SHA-1
(R) DES
(S) MD5

(A) P and R only
(B) Q and R only
(C) Q and S only
(D) R and S only



Answer: (C)

Explanation:
  • RSA – It is an algorithm used to encrypt and decrypt messages.
  • SHA 1 – Secure Hash Algorithm 1, or SHA 1 is a cryptographic hash function. It produces a 160 bit (20 byte) hash value (message digest).
  • DES – Data Encryption Standard, or DES is a symmetric key algorithm for encryption of electronic data.
  • MD5 – Message Digest 5, or MD5 is a widely used cryptographic hash function that produces a 128 bit hash value (message digest).

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