Results 51 to 60 of about 449 (128)
IACR Transactions on Symmetric Cryptology, 2022 HALFLOOP-24 is a tweakable block cipher that is used to protect automatic link establishment messages in high frequency radio, a technology commonly used by government agencies and industries that need highly robust long-distance communications.
Marcus Dansarie +3 more
doaj +1 more source
DESIGNING TWEAKABLE ENCIPHERING SCHEMES USING PUBLIC PERMUTATIONS
, 2023 A tweakable enciphering scheme (TES) is a length preserving (tweakable) encryption scheme that provides (tweakable) strong pseudorandom permutation security on arbitrarily long messages.
Chakraborty, Debrup +2 more
core +1 more source
Building PRFs from TPRPs: Beyond the Block and the Tweak Length Bounds
IACR Transactions on Symmetric CryptologyA secure n-bit tweakable block cipher (TBC) using t-bit tweaks can be modeled as a tweakable uniform random permutation, where each tweak defines an independent random n-bit permutation.
Wonseok Choi, Jooyoung Lee, Yeongmin Lee
doaj +1 more source
A Security Analysis of Deoxys and its Internal Tweakable Block Ciphers
IACR Transactions on Symmetric Cryptology, 2017 In this article, we provide the first independent security analysis of Deoxys, a third-round authenticated encryption candidate of the CAESAR competition, and its internal tweakable block ciphers Deoxys-BC-256 and Deoxys-BC-384. We show that the related-tweakey differential bounds provided by the designers can be greatly improved thanks to a Mixed ...
Carlos Cid +4 more
openaire +4 more sources
Cryptanalysis of IAR-CTR and IAR-CFB and a fixing method
CybersecurityWe present practical attacks on IAR-CTR and IAR-CFB, AE modes proposed by Hwang and Gope to offer both privacy and authenticity in a single pass. Then we use the idea of iCOFB, which is originally defined with a tweakable random function, to fix the IAR ...
Xueqi Zhu +4 more
doaj +1 more source
Improved meet‐in‐the‐middle attacks on reduced‐round Joltik‐BC
IET Information Security, 2021 Joltik‐BC is an internal tweakable block cipher of the authenticated encryption algorithm Joltik, which was a second‐round finalist in the CAESAR competition.
Manman Li, Shaozhen Chen
doaj +1 more source
THF: Designing Low-Latency Tweakable Block Ciphers
IACR Transactions on Symmetric CryptologyWe introduce the Three-Hash Framework (THF), a new instantiation of the LRW+ paradigm that employs three hash functions to process tweak inputs. We prove that THF achieves beyond-birthday-bound security under standard assumptions. By extending the general practical cryptanalysis framework to the multiple-tweak setting, we further demonstrate that THF ...
Wang, Jianhua +5 more
openaire +3 more sources
TNT : how to tweak a block cipher
, 2020 In this paper, we propose Tweak-aNd-Tweak ( for short) mode, which builds a tweakable block cipher from three independent block ciphers. handles the tweak input by simply XOR-ing the unmodified tweak into the internal state of block ciphers twice.
Bao, Zhenzhen +7 more
core +1 more source
Improved meet-in-the-middle attack on reduced-round Kiasu-BC algorithm
Tongxin xuebao, 2022 Kiasu-BC algorithm is an internal tweakable block cipher of authenticated encryption algorithm Kiasu as one of first-round candidates in the CAESAR competition.The precomputation complexity is reduced by utilizing the freedom of the tweak and the ...
Manman LI, Shaozhen CHEN
doaj +2 more sources
Elastic-Tweak: A Framework for Short Tweak Tweakable Block Cipher [PDF]
, 2019 Tweakable block cipher (TBC), a stronger notion than standard block ciphers, has wide-scale applications in symmetric-key schemes. At a high level, it provides flexibility in design and (possibly) better security bounds.
Ashwin Jha +5 more
core