Format-preserving encryption for DateTime
Format-preserving encryption for DateTime
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DOI：
10.1109/icicisys.2010.5658769
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发表时间：
2010-12
期刊：
影响因子：
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通讯作者：
Zheli Liu;Chunfu Jia;Jingwei Li;Xiaochun Cheng
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文献类型：
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作者：
Zheli Liu;Chunfu Jia;Jingwei Li;Xiaochun Cheng
在许多应用中，例如数据库中的DateTime字段的加密，希望将来自任意大小的集合的具有描述为“YYYY-MM-DD HH：MM：SS”的指定格式的项加密到同一集合上。不幸的是，诸如DES、3DES或AES的常规分组密码不适合于此目的。其解决方案属于格式保持加密（FPE）范畴。本文提出了一种基于“秩后密码”模式的DateTime的FPE方案，并对其安全性和效率进行了分析。我们进一步提出了一种新的更有效的方法命名为“基于引用的偏移加密”，以解决FPE问题的日期时间域，它可以应用于消息空间的固定长度的字符串采取了一些字母表以及。
In many applications, such as encryption of DateTime field in database, it is desirable to encrypt items from an arbitrarily sized set with the specified format described as “YYYY-MM-DD HH:MM:SS” onto that same set. Unfortunately, conventional block ciphers such as DES, 3DES or AES are unsuitable for this purpose. The solution to it belongs to the format-preserving encryption (FPE) category. In the paper, we present an FPE scheme for DateTime based on “rank-then-cipher” mode, and then analyze its security and efficiency. We further propose a new more efficient approach named “reference-based offset encryption” to resolve the FPE problem on DateTime domain, which can be applied in message space comprised of fixed-length strings taken over some alphabet as well.