1. Which is True about digital signatures?

(a) Only digital signature system can provide a nonrepudiation security service.

(b) Anyone can generate a digital signature with a public key.

(c) RSA can not be used for digital signature services.

(d) All the public key cryptographies can provide digital signature services

2.

Which is NOT true about random numbers?

(a) Each value in the sequence must be inferred from the others for dependence.

(b) Frequency of occurrence of each of the numbers should be approximately the same

(c) Attackers should not be able to predict future elements of the sequence on the basis of earlier elements.

(d) Pseudorandom numbers are deterministic and therefore produce sequences of numbers that are not statistically random.

3. Which is NOT true about public-key cryptosystems?

(a) A public key cryptography has two keys: private or public keys.

(b) The private key is always used for data encryption.

(c) A public key cryptography utilizes the difficulty of number theories like a large prime factorization problem.

(d) Public key cryptosystems are mostly slower than block ciphers.

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Step 1 1 ANSWER d All the public key cryptographies can provide digital signat... View the full answer