关键词: 个人医疗健康档案, 可撤销的外包, 属性撤销

Abstract: With the rapid development of the cloud computing, Personal Health Record（PHR） has become a hot topic recently. In order to realize a secure and efficient PHR scheme, this paper presents a revocable outsourced CP-ABE based PHR scheme. In the scheme, it divides the users into Personal Domain（PSD） and Public Domain（PUD）. In the PSD, it adopts the Improved Key-Aggregate Encryption（IKAE） and the Improved Attribute-based Signature（IABS） respectively to achieve read access permission and write access permission. For the PHR users of PUD, it uses revocable outsource-able MA-ABE to largely eliminate the overhead for both the PHR owner and users, which can also support efficient attribute and user revocation. At the same time, the import of multi-authority reduces the complexity of the key management. The performance testing results show the security and efficiency of the proposed scheme.

Key words: Personal Health Record（PHR）, revocable outsourced, revocation