Step-out group signatures

First ever implementation of step-out group signatures.

Original paper: https://link.springer.com/article/10.1007/s00607-009-0040-0

Overview

Client-server application supporting management of step-out group signatures.

Features

• Registering in a system (joining the whole group of users which can create a step-out group signature)
• Creating a step-out group signature
• Verifying of a step-out group signature
• Proving that a user was participating in a creation of some valid step-out group signature
• Proving that a user was not participating in a creation of some valid step-out group signature