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Computer Networks
Digital Signatures
Q
What is the advantage of digital signing a hash instead of signing the entire data in RSA?
AA. Time saving
BB. Security
CC. Time saving and computationally less expensive
DD. Secured and less time requires
Correct Answer:
C. C. Time saving and computationally less expensive
Explanation:
RSA uses expressions with exponential, that is modular exponentiation. So, it is difficult to let the large data be signed using modular exponentiation. Hash value of the message is small compared to the whole message. So, it saves time and computation power to use hash to be signed.
