Weak-Key Analysis of POET

Mohamed Ahmed Abdelraheem; Andrey Bogdanov; Elmar Tischhauser

Paper 2014/226

Weak-Key Analysis of POET

Mohamed Ahmed Abdelraheem, Andrey Bogdanov, and Elmar Tischhauser

Abstract

We evaluate the security of the recently proposed authenticated encryption scheme POET with regard to weak keys when its universal hash functions are instantiated with finite field multiplications. We give explicit constructions for weak key classes not covered by POET's weak key testing strategy, and demonstrate how to leverage them to obtain universal forgeries.

Note: Editorial updates.

Metadata

Available format(s): PDF
Category: Secret-key cryptography
Publication info: Preprint. MINOR revision.
Keywords: CAESAR POET Authenticated Encryption Polynomial hashing Forgery polynomials Weak keys
Contact author(s): mohab @ dtu dk
History: 2014-04-09: revised; 2014-03-29: received; See all versions
Short URL: https://ia.cr/2014/226
License: CC BY

BibTeX

@misc{cryptoeprint:2014/226,
      author = {Mohamed Ahmed Abdelraheem and Andrey Bogdanov and Elmar Tischhauser},
      title = {Weak-Key Analysis of {POET}},
      howpublished = {Cryptology {ePrint} Archive, Paper 2014/226},
      year = {2014},
      url = {https://eprint.iacr.org/2014/226}
}