策略隐藏的属性加密方案在智慧医疗系统的应用

Application of Attribute Encryption Scheme of Policy Hiding in Intelligent Medical System

目前智慧医疗的广泛应用给予我们就医方便的同时,存在患者对个人医疗数据不可控、隐私泄露、共享效率低下等问题。针对这些问题,本方案提出了一种基于策略隐藏的属性加密方案在智慧医疗系统中的应用。首先,本方案使用属性加密技术加密电子医疗记录不仅可以保护用户隐私,也实现了细微粒的访问控制;其次,通过隐藏访问结构,更加安全地保护用户的敏感信息不会被轻易泄露;此外,用户在解密时使用外包解密的形式把隐藏的访问结构和加密的密文文档发送于医疗云服务器,从而减小用户的解密开销;本方案还支持密文检索,在解密之前,这个技术被用来实行解密测试,极大地提高了解密有效性。最后,效率分析表明,本方案在保护患者隐私安全的情况下,满足云存储环境下密钥管理的安全、高效的要求。

At present,while the wide application of smart medical treatment makes it convenient for us to see a doctor,there are problems such as uncontrollable personal medical data of patients,privacy disclosure,and low sharing efficiency.To solve these problems,this scheme proposes an attribute encryption scheme based on policy hiding in the smart medical system.Firstly,this scheme uses attribute encryption technology to encrypt electronic medical records not only to protect user privacy,but also to realize the access control of fine particles.Secondly,by hiding the access structure,it is more secure to protect the sensitive information of users from being easily leaked;In addition,the user sends the hidden access structure and encrypted ciphertext documents to the medical cloud server in the form of outsourced decryption,thus reducing the decryption cost of the user;The scheme also supports ciphertext retrieval,which is used to perform decryption tests before decryption,greatly improving the decryption effectiveness.Finally,efficiency analysis shows that this scheme meets the requirements of secure and efficient key management in cloud storage environment while protecting the privacy and security of patients.