A process for the digital signature with zero - knowledge, for the production of collision resistant signatures

摘要

The present invention relates to processes for the digital signature called a public key and knowledge of zero, used to generate digital signatures (s) attached to the messages (m) to be transmitted. A method according to the invention comprises a step of conversion of at least one parameter conventional (e, y) of the signature of a new parameter (e ', y') of the signature, consisting in combining by means of a function of combining reversibly (fc) the parameter (e, y) to be transformed with a third parameter (g (m), h2) depending on the message (m) to be signed. Advantages: preparation of a signature that is resistant to the invention without having recourse to a function of chopping resistant to collisions and without increasing the length of the signature.