Scheme

Advantages

Drawback

Z. Hairong et al.’s Scheme [7]

It improves the computational speed.

Without using the pre-computation condition verification is speedup.

It does not require modular inversion operation in verification.

It improve effectively the operation speed particularly for a large no of message to be signed & verify.

Verification speed is less than IDSA.

G. Han et al.’s Scheme [8]

Value of k may not be changed for every new signature.

More secure than the original scheme.

None