Question

In terms of speed (slowest to fastest), which of the following orders are correct?
a. Hash computation, Public-key encryption, Symmetric-key encryption
b. Public-key encryption, Symmetric-key encryption, Hash computation
c. Symmetric-key encryption, Public-key encryption, Hash computation
d. None of these.

Answer 1

Answer:

B

Explanation:

Hash is always the fastest as it not a process of encryption-decryption. Then comes Symmetric-key is 100 times faster than assymetric (public-key). Public key encryption takes a longer time for computation. Therefore the answer is B.

Answer 2

Answer:

Option B  is correct

Because in terms of speed "Public-key encryption < Symmetric-key encryption < Hash computation”.

Explanation:

• These three are classes of Cryptographic Algorithms. Hash Computation is used to minimize the size of the data i.e to decrease the size of data so it takes less time then other both, while Symmetric-key encryption does the process that if the user don’t have the key than the data is undecryptable, so it take more time than Hash computation and less time than Public-key encryption.
• Moreover, Public-key encryption, it has to make two keys(public and private), though it takes more time than other both.