基于边缘计算的并行密钥隔离聚合签名方案OA北大核心CSTPCD

The emergence of wireless medical sensor networks has brought great convenience to the treatment of pa-tients.However,in wireless medical sensor networks,untrusted public channels are often used for data communication and only a single cloud server processes a large amount of medical data,which leads to communication security,privacy preser-vation,key leakage,excessive computational burden on the cloud server,and high latency.In addition,most existing certifi-cateless aggregate signature schemes are unable to resist fully chosen-key attacks.Therefore,to address the above problems,a certificateless parallel key isolation aggregate signature scheme based on edge computing for wireless medical sensor net-works is proposed.The scheme uses the architecture of edge computing so that the verification and aggregation process of signatures is carried out at the edge layer closer to the end-user,which can reduce the computing burden of the central cloud server and ensure effective privacy protection.The proposed scheme inherits the advantages of certificateless and key isola-tion,while avoiding complex certificate management,key escrow,and key exposure.Under the random oracle model,it is proved that the proposed scheme can resist fully chosen-key attacks,Type I attacks,and Type II attacks.The performance analysis shows that,compared with the related certificateless signature scheme,the computational efficiency of the pro-posed scheme can be reduced by at least 74.03%,and the communication overhead can be reduced by at least 25%.