Abstract: In order to safely and reliably retrieve and verify the data possession in the e-health system, this paper proposes a data retrieval scheme. Combined with the edit distance, the multi-keyword fault-tolerant joint search function is realized. Based on the knowledge of coding Hash, the verification of the data possession in electronic medical system is implemented. Based on privilege tree authority controlling, the fine-grained access control of medical records in electronic medical system is realized. Security analysis shows that this scheme is safe and reliable in theoretical analysis, which ensures the program is safe in a cloud environment. Performance analysis shows that this scheme is effective in search efficiency and data possession validation.

Key words: e-health, edit distance, multi-keyword fault-tolerant, coding Hash, data possession

摘要： 为了安全可靠地检索、持有性验证电子医疗系统中重要的病历数据，提出了一种适用于电子医疗系统下支持数据持有性验证的检索方案。结合编辑距离，实现了多关键字容错联合搜索功能；基于编码Hash相关知识实现了对电子医疗系统中病历数据的持有性验证；基于特权树权限控制，实现了对电子医疗系统中病历数据的细粒度权限控制。安全性分析表明，方案在理论分析上是安全可靠的。实验数据表明，方案在搜索效率以及数据持有性验证方面实际有效。

关键词: 电子医疗, 编辑距离, 多关键字容错, 编码Hash, 数据持有性