保留格式加密模型研究  

Research on the format-preserving encryption modes

作　　者：刘哲理[1] 贾春福[1] 李经纬[1] 

机构地区：[1]南开大学信息技术科学学院,天津300071

出　　处：《通信学报》2011年第6期184-190,共7页Journal on Communications

基　　金：国家自然科学基金资助项目(60973141);天津市自然科学基金资助项目(09JCYBJ00300);高等学校博士学科点专项科研基金资助项目(20100031110030)~~

摘　　要：对保留格式加密(FPE,format preserving encryption)进行了研究,指出加密模型的设计思想正向如何降低问题域的复杂性发展;提出了编码后加密(CtE,coding-then-encipher)的新模型,描述了工作原理及算法,分析了安全性;最后提出了CtE模型在charsn域内的一个应用方案,介绍了使用的编解码算法,分析了其效率。FPE （format-preserving encryption） was discussed, and it was shown that how to reduce domain complexity was the direction of designing FPE modes. A new FPE mode named coding-then-encipher mode was proposed and its operating principle and security were described in detail, and it was pointed out that the key for this mode was finding efficient encode and decode algorithms on domain. Furthermore, a scheme under coding-then-encipher mode which can resolve FPE problem in chars^n was presented, the encode and decode algorithms were described, and their efficiency were analyzed.

关 键 词：保留格式加密 排序后加密 编码后加密 随机基准值加密 

分 类 号：TP393.08[自动化与计算机技术—计算机应用技术]