Question

What do you mean by second preimage resistance in the context of hash functions?

a. Except for few hash values H, it is difficult to find a message M such that the hash of M is H.

 

b. Given a message M1, it is difficult to find another message M2 such that the corresponding hash values are the same.

 

c. It is difficult to find two messages M1 and M2 such that their hash values are the same.

 

d. None of these.

​

Answer 1

Answer:

d is the answer

may be none of these

Answer 2

Answer:

B

Explanation:

Second Preimage Resistance (Weak Collision Resistance) Given input m 1, it should be hard to find another message m 2 such that hashing = hash(m 2) and that m 1 ≠ m 2.