The growing need to store, share, and manage medical and health records has resulted in electronic medical health sharing system (mHealth), which provides intelligent medical treatment for people. Attribute-based encryption (ABE) is regarded as a new cryptology to enhance fine-grained access control over encrypted sharing data in mHealth. However, some existing attribute-based mHealth systems not only violate the one-to-many application characteristics of attribute-based encryption mechanism but also destroy the anonymity of user. In this study, an efficient scheme is proposed to tackle the above defaults and offer two-way anonymity of data owner and data user by introducing a pseudoidentity. The computation of hidden access policy is reduced by removing the bilinear pairing, whereas the interaction between cloud storage and data user is avoided to save bandwidth during trapdoor generation. We also consider the temporal factor of the uploaded information by introducing access validity. Security and performance analyses show that the proposed scheme is efficient without reducing security.

中文翻译：

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移动医疗网络中具有可隐藏策略的基于可追踪属性的安全数据共享

存储，共享和管理医疗和健康记录的需求不断增长，因此产生了电子医疗健康共享系统（mHealth），该系统可为人们提供智能医疗服务。基于属性的加密（ABE）被视为一种新的加密技术，可增强对mHealth中加密共享数据的细粒度访问控制。但是，一些现有的基于属性的mHealth系统不仅违反了基于属性的加密机制的一对多应用程序特性，而且破坏了用户的匿名性。在这项研究中，提出了一种有效的方案来解决上述默认问题，并通过引入伪身份来提供数据所有者和数据用户的双向匿名性。通过删除双线性对，减少了隐藏访问策略的计算，而避免了云存储和数据用户之间的交互以节省陷门生成期间的带宽。我们还通过引入访问有效性来考虑上载信息的时间因素。安全性和性能分析表明，该方案在不降低安全性的前提下是有效的。