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edited Jul 8, 2022 at 11:05

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Why s=0$s=0$ is not allowed in Elgamal signature?

Bumped by Community user

occurred Jul 4, 2022 at 18:00

Bumped by Community user

occurred Jun 3, 2022 at 21:04

Bumped by Community user

occurred Feb 3, 2022 at 21:04

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asked Jan 4, 2022 at 16:33

Mohammadsadeq Borjiyan

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Why s=0 is not allowed in Elgamal signature?

In Elgamal signature scheme $\text{sig}_{k_{pr}}(x,k_E)=(r,s)$, $s=0$ is not allowed. How does this lead to finding the private key $d$?

elgamal-signature