Paper 2017/877

Identity-Based Format-Preserving Encryption

Mihir Bellare and Viet Tung Hoang

Abstract

We introduce identity-based format-preserving encryption (IB-FPE) as a way to localize and limit the damage to format-preserving encryption (FPE) from key exposure. We give definitions, relations between them, generic attacks and two transforms of FPE schemes to IB-FPE schemes. As a special case, we introduce and cover identity-based tweakable blockciphers. We apply all this to analyze DFF, an FPE scheme proposed to NIST for standardization.

Metadata
Available format(s)
PDF
Category
Secret-key cryptography
Publication info
Published elsewhere. MAJOR revision.ACM Computer and Communications Security Conference 2017
DOI
10.1145/3133956.3133995
Keywords
identity-based cryptographyformat-preserving encryptiontweakable blockcipherideal-cipher modelpseudorandom function
Contact author(s)
mihir @ eng ucsd edu
History
2017-09-13: received
Short URL
https://ia.cr/2017/877
License
Creative Commons Attribution
CC BY

BibTeX

@misc{cryptoeprint:2017/877,
      author = {Mihir Bellare and Viet Tung Hoang},
      title = {Identity-Based Format-Preserving Encryption},
      howpublished = {Cryptology ePrint Archive, Paper 2017/877},
      year = {2017},
      doi = {10.1145/3133956.3133995},
      note = {\url{https://eprint.iacr.org/2017/877}},
      url = {https://eprint.iacr.org/2017/877}
}
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