Paper 2022/268
Efficient Schemes for Committing Authenticated Encryption
Mihir Bellare and Viet Tung Hoang
Abstract
This paper provides efficient authenticated-encryption (AE) schemes in which a ciphertext is a commitment to the key. These are extended, at minimal additional cost, to schemes where the ciphertext is a commitment to all encryption inputs, meaning key, nonce, associated data and message. Our primary schemes are modifications of GCM (for basic, unique-nonce AE security) and AES-GCM-SIV (for misuse-resistant AE security) and add both forms of commitment without any increase in ciphertext size. We also give more generic, but somewhat more costly, solutions.
Metadata
- Available format(s)
-
PDF
- Category
- Secret-key cryptography
- Publication info
- A major revision of an IACR publication in EUROCRYPT 2022
- Keywords
- Symmetric EncryptionAuthenticated EncryptionGCMPRFHash Functioncommitment
- Contact author(s)
-
mihir @ eng ucsd edu
tvhoang @ cs fsu edu - History
- 2022-05-11: last of 2 revisions
- 2022-03-02: received
- See all versions
- Short URL
- https://ia.cr/2022/268
- License
-
CC BY
BibTeX
@misc{cryptoeprint:2022/268,
author = {Mihir Bellare and Viet Tung Hoang},
title = {Efficient Schemes for Committing Authenticated Encryption},
howpublished = {Cryptology ePrint Archive, Paper 2022/268},
year = {2022},
note = {\url{https://eprint.iacr.org/2022/268}},
url = {https://eprint.iacr.org/2022/268}
}
