What is the Z8X attack in the Elgamal digital signature scheme, and how does it allow an adversary to generate a valid signature without knowing the private key?
Thursday, 03 August 2023
by EITCA Academy
The Z8X attack is a known vulnerability in the Elgamal digital signature scheme that allows an adversary to generate a valid signature without knowledge of the private key. In order to understand this attack, it is important to have a clear understanding of the Elgamal digital signature scheme and its underlying mathematics. The Elgamal digital