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个人健康记录服务是一项新兴的医疗信息交换服务,在该服务中,病人的记录和信息都是由自己存放在网络上的,现实中都是外包给第三方的云服务器,而云服务商是不完全可信的,因此在云环境中提供高效而又安全的访问控制是当前亟待解决的问题之一.采用基于属性的加密方法加密病人的记录并上传至云服务器是安全可行的.为此设计出一种在个人健康记录服务中使用并支持属性撤销的加密方案,采用密文密钥定长的方式实现节约存储空间的目的,引入版本号标记和代理重加密技术实现属性的撤销.最后,从安全性以及效率方面得出方案的安全性与高效性,证明其适用于个人健康记录服务模型.
Personal health record service is a new medical information exchange service, in which the patient’s records and information are stored by themselves on the network, in fact, are outsourced to third-party cloud servers, and cloud service providers Is not completely credible, so to provide efficient and secure access control in cloud environment is one of the most urgent problems to be solved.It is safe and feasible to use the property-based encryption method to encrypt the patient’s record and upload it to the cloud server. In this paper, an encryption scheme which is used in personal health record service and supports revocation of attributes is designed. The purpose of saving storage space is achieved by using cipher key fixed length, and the version mark and proxy re-encryption technology are introduced to revise attributes. Finally, the safety and efficiency of the program are derived from the aspects of safety and efficiency, which proves that it applies to the personal health record service model.