The FFX Mode of Operation for Format-Preserving Encryption
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چکیده
Schemes for FPE enable one to encrypt Social Security numbers (SSNs), credit card numbers (CCNs), and the like, doing so in such a way that the ciphertext has the same format as the plaintext. In the case of SSNs, for example, this means that the ciphertext, like the plaintext, consists of a nine decimal-digit string. Similarly, encryption of a 16-digit CCN results in a 16-digit ciphertext. FPE is rapidly emerging as a useful cryptographic tool, with applications including financial-information security, data sanitization, and transparently encrypting fields in a legacy database.
منابع مشابه
Addendum to “The FFX Mode of Operation for Format-Preserving Encryption” A parameter collection for enciphering strings of arbitrary radix and length
Background. A scheme for format-preserving encryption (FPE) is supposed to do that which a conventional (possibly tweakable) blockcipher does—encipher messages within some message space X—except that message space, instead of being something like X = {0, 1}128, is more general [1, 3]. For example, the message space might be the set X = {0, 1, . . . , 9}16, in which case each 16-digit plaintext ...
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Format-preserving encryption (FPE) encrypts a plaintext of some specified format into a ciphertext of the same format—for example, encrypting a social-security number into a social-security number. In this survey we describe FPE and review known techniques for achieving it. These include FFX, a recent proposal made to NIST.
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تاریخ انتشار 2010