Results 31 to 40 of about 385 (169)

1, 2, 3, Fork: Counter Mode Variants based on a Generalized Forkcipher

IACR Transactions on Symmetric Cryptology, 2021
A multi-forkcipher (MFC) is a generalization of the forkcipher (FC) primitive introduced by Andreeva et al. at ASIACRYPT’19. An MFC is a tweakable cipher that computes s output blocks for a single input block, with s arbitrary but fixed.
Elena Andreeva, Amit Singh Bhati, Bart Preneel, Damian Vizár   +3 more
doaj   +1 more source

On Hashing with Tweakable Ciphers [PDF]

, 2009
Cryptographic hash functions are often built on block ciphers in order to reduce the security analysis of the hash to that of the cipher, and to minimize the hardware size. Well known hash constructs are used in international standards like MD5 and SHA-1.
R. C.-W. Phan, Raphael C.-W. Phan (7168670), J.-P. Aumasson, Jean-Philippe Aumasson (7210217)   +3 more
core   +1 more source

Cryptanalysis of Deoxys and its Internal Tweakable Block Ciphers

IACR Cryptol. ePrint Arch., 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.
Carlos Cid, Yu Sasaki, Ling Song, Tao Huang, Thomas Peyrin   +4 more
core   +2 more sources

Triplex: an Efficient and One-Pass Leakage-Resistant Mode of Operation

Transactions on Cryptographic Hardware and Embedded Systems, 2022
This paper introduces and analyzes Triplex, a leakage-resistant mode of operation based on Tweakable Block Ciphers (TBCs) with 2n-bit tweaks. Triplex enjoys beyond-birthday ciphertext integrity in the presence of encryption and decryption leakage in a ...
Yaobin Shen, Thomas Peters, François-Xavier Standaert, Gaëtan Cassiers, Corentin Verhamme   +4 more
doaj   +3 more sources

XHX - A Framework for Optimally Secure Tweakable Block Ciphers from Classical Block Ciphers and Universal Hashing [PDF]

, 2021
Tweakable block ciphers are important primitives for designing cryptographic schemes with high security. In the absence of a standardized tweakable block cipher, constructions built from classical block ciphers remain an interesting research topic in ...
Ashwin Jha, Mridul Nandi, Eik List, Sweta Mishra, Kazuhiko Minematsu   +4 more
core  

Tweakable TWINE: Building a Tweakable Block Cipher on Generalized Feistel Structure

IEICE Transactions on Fundamentals of Electronics, Communications and Computer Sciences, 2019
Tweakable block cipher (TBC) is an extension of conventional block cipher. We study how to build a TBC based on generalized Feistel structure (GFS), a classical block cipher construction. While known dedicated TBC proposals are based on substitution-permutation network (SPN), GFS has not been used for building TBC.
Kosei Sakamoto, Kazuhiko Minematsu, Nao Shibata, Maki Shigeri, Hiroyasu Kubo, Yuki Funabiki, Andrey Bogdanov, Sumio Morioka, Takanori Isobe 0001   +8 more
openaire   +1 more source

Fixslicing AES-like Ciphers

Transactions on Cryptographic Hardware and Embedded Systems, 2020
The fixslicing implementation strategy was originally introduced as a new representation for the hardware-oriented GIFT block cipher to achieve very efficient software constant-time implementations.
Alexandre Adomnicai, Thomas Peyrin
doaj   +3 more sources

Local Search and the Evolution of World Models

Topics in Cognitive Science, EarlyView., 2023
Abstract An open question regarding how people develop their models of the world is how new candidates are generated for consideration out of infinitely many possibilities. We discuss the role that evolutionary mechanisms play in this process. Specifically, we argue that when it comes to developing a global world model, innovation is necessarily ...
Neil R. Bramley, Bonan Zhao, Tadeg Quillien, Christopher G. Lucas   +3 more
wiley   +1 more source

Improved Security Bounds for Generalized Feistel Networks

IACR Transactions on Symmetric Cryptology, 2020
We revisit the security of various generalized Feistel networks. Concretely, for unbalanced, alternating, type-1, type-2, and type-3 Feistel networks built from random functions, we substantially improve the coupling analyzes of Hoang and Rogaway (CRYPTO
Yaobin Shen, Chun Guo, Lei Wang
doaj   +1 more source

Clustering Related-Tweak Characteristics: Application to MANTIS-6

IACR Transactions on Symmetric Cryptology, 2018
The TWEAKEY/STK construction is an increasingly popular approach for designing tweakable block ciphers that notably uses a linear tweakey schedule. Several recent attacks have analyzed the implications of this approach for differential cryptanalysis and ...
Maria Eichlseder, Daniel Kales
doaj   +1 more source