Key Committing AEADs

Shay Gueron

Paper 2020/1153

Key Committing AEADs

Shay Gueron

Abstract

This note describes some methods for adding a key commitment property to a generic (nonce-based) AEAD scheme. We analyze the the privacy bounds and key commitment guarantee of the resulting constructions, by expressing them in terms of the properties of the underlying AEAD scheme and the added key commitment primitive. We also offer concrete constructions for a key committing version of AES-GCM.

Metadata

Available format(s): PDF
Category: Secret-key cryptography
Publication info: Preprint. MINOR revision.
Keywords: AEAD Robust encryption key commitment
Contact author(s): shay gueron @ gmail com
History: 2020-09-25: received
Short URL: https://ia.cr/2020/1153
License: CC BY

BibTeX

@misc{cryptoeprint:2020/1153,
      author = {Shay Gueron},
      title = {Key Committing AEADs},
      howpublished = {Cryptology ePrint Archive, Paper 2020/1153},
      year = {2020},
      note = {\url{https://eprint.iacr.org/2020/1153}},
      url = {https://eprint.iacr.org/2020/1153}
}