An efficient scheme based on DLP and RSA for proxy Group signature

In the proxy signature scheme, the capability of anonymous proxy is request for protecting the proxy signer's privacy. In the Group signature, when the signer has been identified, the group authority needs not to redistribute any of the keys of this signer and the resulting signature does not reveal the identity of the signer. In This Scheme, Introduces a concept and model of proxy group signature and constructs a proxy group signature scheme based on Discrete Logarithm Problem and RSA. This scheme has the property of hiding the identity of the signer in the signature. The signer's identity can be open by a manager when the dispute or problem creates, so it is a new anonymous proxy signature scheme. The analysis of security shows that the scheme satisfies the security requirements or properties.