Identity-Based Format-Preserving Encryption

Mihir Bellare; Viet Tung Hoang

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 cryptography format-preserving encryption tweakable blockcipher ideal-cipher model pseudorandom function
Contact author(s): mihir @ eng ucsd edu
History: 2017-09-13: received
Short URL: https://ia.cr/2017/877
License: 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},
      url = {https://eprint.iacr.org/2017/877}
}