Question

Consider a variant of DSA in which the message space is Zq and his omitted. (So the second component of the signature is now s:

A) The public key is absent.
B) The private key is absent.
C) The message space is modified.
D) The signature scheme is altered.

Answer 1

The question addresses a modified version of DSA where the hashing step is absent, which is a change in the signature scheme within the realm of cryptography, a topic in Computers and Technology.

Step-by-step explanation:

The question pertains to a variant of the Digital Signature Algorithm (DSA) where the message space is Zq and h (hash of the message) is omitted. In standard DSA, the message is first hashed and then a signature is computed using both private and public keys. With the omission of h, it represents a modification to the signature scheme since the signing process no longer involves hashing the message. Moreover, this could potentially affect the security and functionality of the signature scheme.