区域医疗系统数据真实性保障流程优化  

Improvement of data authenticity assurance process in regional health information system

作　　者：周天舒[1] 李劲松[1] 杨一兵[1] 陈运奇[2] 薛万国[2] 赵军平[2] 

机构地区：[1]浙江大学数字化医疗工程研究中心,浙江杭州310027 [2]解放军总医院,北京100853

出　　处：《浙江大学学报（工学版）》2010年第8期1484-1489,1507,共7页Journal of Zhejiang University：Engineering Science

基　　金：国家科技支撑计划资助项目(2006BAH02A28)

摘　　要：针对区域医疗系统文件数量巨大、内容重要敏感、共享需求大等特点,提出文件摘要之间相互关联的滚动摘要法,以取代常用的3层哈希列表摘要结构,并在此基础上设计出更灵活的分组滚动摘要法.通过分析哈希列表摘要法和滚动摘要法的文件校验次数,证明新摘要方法文件真实性校验的运行效率远高于哈希列表摘要法.在104个医疗数据文件的对比实验中,新方法的校验时间从原方法平均校验时间6.71s缩短到0.21s.新方法还简化了3层哈希列表摘要结构的第2轮摘要过程,使系统的整体效率得到较大提高.基于摘要之间的相关性,滚动摘要法为优化区域医疗数据真实性保障流程提供了一种有效的解决方案.A rolling digest method was proposed for data authenticity assurance process in regional health information system（RHIS）to replace the current three-layer Hash list structure.In the new method,each digest is relative to the former digest,it facilitates accessing,protection,and sharing of huge quantity of medical data in RHIS.Based on relative digest structure,a more flexible method,partially rolling digest method,was designed.By analyzing check times in verification processes,rolling digest method is proved more efficient than Hash list method in locating error files.A 10 000-file comparison experiment shows that the verify time drops form 6.71sas average time in Hash list method to 0.21sin rolling digest method.In addition,rolling digest method simplifies the second round digest process of three-layer hash list structure,making the entire system more efficient.For its relativity in digests,the rolling digest method provides an effective solution to improve the data authenticity assurance process in RHIS.

关 键 词：区域医疗 数据安全 报文摘要 数据真实性 

分 类 号：TP309.2[自动化与计算机技术—计算机系统结构]