Paper 2024/975
ZLR: a fast online authenticated encryption scheme achieving full security
Abstract
Online authenticated encryption has been considered of practical relevance in light-weight environments due to low latency and constant memory usage. In this paper, we propose a new tweakable block cipher-based online authenticated encryption scheme, dubbed ZLR, and its domain separation variant, dubbed DS-ZLR. ZLR and DS-ZLR follow the Encrypt-MixEncrypt paradigm. However, in contrast to existing schemes using the same paradigm such as ELmE and CoLM, ZLR and DS-ZLR enjoy n-bit security by using larger internal states with an efficient ZHash-like hashing algorithm. In this way, 2n-bit blocks are processed with only a single primitive call for hashing and two primitive calls for encryption and decryption, when they are based on an n-bit tweakable block cipher using n-bit (resp. 2n-bit) tweaks for ZLR (resp. DS-ZLR). Furthermore, they support pipelined computation as well as online nonce-misuse resistance. To the best of our knowledge, ZLR and DS-ZLR are the first pipelineable tweakable block cipher-based online authenticated encryption schemes of rate 2/3 that provide n-bit security with online nonce-misuse resistance.
Metadata
- Available format(s)
-
PDF
- Category
- Secret-key cryptography
- Publication info
- Published elsewhere. Designs, Codes and Cryptography
- DOI
- 10.1007/s10623-024-01434-6
- Keywords
- Online authenticated encryptionNonce-misuse resistanceTweakable block ciphers
- Contact author(s)
-
wonseok @ purdue edu
mathience98 @ kaist ac kr
byghak lee @ samsung com
hicalf @ kaist ac kr - History
- 2024-06-18: approved
- 2024-06-17: received
- See all versions
- Short URL
- https://ia.cr/2024/975
- License
-
CC BY
BibTeX
@misc{cryptoeprint:2024/975,
author = {Wonseok Choi and Seongha Hwang and Byeonghak Lee and Jooyoung Lee},
title = {{ZLR}: a fast online authenticated encryption scheme achieving full security},
howpublished = {Cryptology {ePrint} Archive, Paper 2024/975},
year = {2024},
doi = {10.1007/s10623-024-01434-6},
url = {https://eprint.iacr.org/2024/975}
}