Is there proof to the relation between the gap Diffie-Hellman problem and the the Cha-Cheon signature scheme?
I am trying to prove that… "If the gap Diffie-Hellman problem is easy, then the Cha-Cheon signature scheme will be broken." Can you help me prove it? Is there any proof to the relation between the ...
Every time when I read a paper that has digital signature, when it comes to prove the security of a digital signature scheme, many chances that the author will use the forking lemma. The forking ...
If I'm able to prove that any scheme satisfies confidentiality ad unforgeability conditions, will it be a valid signcryption scheme, without explicit signature and encryption parts ?
Is Guillou-Quisquater existentially unforgeable against adaptive message attack under a random oracle model?
First of all, the Guillou-Quisquater digital signature scheme is: Note everything is $\bmod n$. Message is denoted by $m$. Private key: $s$ Public key: Hash function $H$, $e$, ...