Provably Secure And Efficient Proxy Signature Scheme And Its Application

With the rise of Internet Plus initiatives,the traditional manual approval process has entered the information age,and information security has gradually become a hot research topic.Digital signature technology is an important part of information security.The special features of proxy signatures make it meet the requirements of agency approval in the workflow system,and can effectively improve the data security during the approval process.This paper focuses on the analysis and research of proxy signatures based on short signatures,and studies its application in the approval of distributed workflow agents.The specific research content is as follows:1.Most traditional proxy signature schemes lack the binding between secret parameters and secret keys.To this end,a proxy short signature scheme is designed to achieve the binding between secret parameters and secret keys,and the binding of agent and delegated secret keys.Based on the difficulty of β-CAA under the random oracle model,it proves that the scheme is anti-existence forgery.Finally,the scheme is analyzed and compared in efficiency and implemented in code.This scheme can not only avoid various forms of public key replacement attacks,but also has the advantages of forward security,short signature length,and high signature efficiency.2.In order to meet the security requirements of distributed workflow agent approval,a distributed proxy approval model is designed.The distributed architecture is used to improve the concurrent processing ability and operation efficiency.And a distributed workflow agent approval security scheme is proposed based on the proxy short signature scheme.Finally,the security of the scheme is analyzed,and the scheme is proved that it can effectively protect the security of approval data.