A group digital signature scheme based on Schnorr protocol for e-cooperative work in engineering design

In the paper, we introduce a group digital signature scheme. The scheme is aimed at electronic checkup, proofreading, cosigning, etc. for e-cooperative work in engineering design, which is based on the Schnorr protocol. It solves the security problem in the process of e-cooperative work. We design the scheme to include the group digital signature and verification in sequence and at one time for the characteristic of e-cooperative work. We also analyze the safety and anti-attack qualities of the scheme.