Results 11 to 20 of about 12,741,900 (205)
Attacking Reduced Round SHA-256 [PDF]
, 2008 The SHA-256 hash function has started getting attention recently by the cryptanalysis community due to the various weaknesses found in its predecessors such as MD4, MD5, SHA-0 and SHA-1. We make two contributions in this work. First we describe message modification techniques and use them to obtain an algorithm to generate message pairs which collide ...
Somitra Kumar Sanadhya +1 more
core +6 more sources
Analysis of Step-Reduced SHA-256 [PDF]
, 2006 This is the first article analyzing the security of SHA-256 against fast collision search which considers the recent attacks by Wang et al. We show the limits of applying techniques known so far to SHA-256. Next we introduce a new type of perturbation vector which circumvents the identified limits.
Florian Mendel +3 more
openaire +4 more sources
Second-Order Differential Collisions for Reduced SHA-256 [PDF]
, 2011 In this work, we introduce a new non-random property for hash/compression functions using the theory of higher order differentials. Based on this, we show a second-order differential collision for the compression function of SHA-256 reduced to 47 out of 64 steps with practical complexity. We have implemented the attack and provide an example.
Alex Biryukov +3 more
core +6 more sources
SHA-256 Collision Attack with Programmatic SAT [PDF]
CoRRTo appear in the 2024 Proceedings of the International Workshop on Satisfiability Checking and Symbolic ...
Nahiyan Alamgir +2 more
openaire +4 more sources
A Secure IoT-Blockchain Framework for Vaccine Cold-Chain Monitoring With Predictive Analytics. [PDF]
Public Health ChallThis proof‐of‐concept framework integrates IoT sensing, secure MQTT/TLS communication, SHA‐256 hash verification, permissioned blockchain provenance tracking, and predictive analytics for vaccine cold‐chain monitoring. Evaluation using 26,674 logistics observations shows feasible secure telemetry management and short‐term temperature forecasting to ...
Muthusamy L +3 more
europepmc +2 more sources
Double SHA-256 Hardware Architecture With Compact Message Expander for Bitcoin Mining
IEEE Access, 2020 In the Bitcoin network, computing double SHA-256 values consumes most of the network energy. Therefore, reducing the power consumption and increasing the processing rate for the double SHA256 algorithm is currently an important research trend.
Hoai Luan Pham +5 more
doaj +1 more source
Security Analysis of SHA-256 and Sisters [PDF]
, 2004 This paper studies the security of SHA-256, SHA-384 and SHA-512 against collision attacks and provides some insight into the security properties of the basic building blocks of the structure. It is concluded that neither Chabaud and Joux’s attack, nor Dobbertin-style attacks apply.
Henri Gilbert, Helena Handschuh
openaire +2 more sources
Science Journal of University of Zakho, 2023 The Internet of Things (IoT) as an important technology consists of a heterogeneous and huge number of devices that generates an enormous amount of data in various applications.
Arkan A. Saffer +2 more
doaj +1 more source
Collisions for Step-Reduced SHA-256 [PDF]
, 2008 In this article we find collisions for step-reduced SHA-256. We develop a differential that holds with high probability if the message satisfies certain conditions. We solve the equations that arise from the conditions. Due to the carefully chosen differential and word differences, the message expansion of SHA-256 has little effect on spreading the ...
Ivica Nikolic, Alex Biryukov
openaire +2 more sources
Custom ASIC Design for SHA-256 Using Open-Source Tools
Computers, 2023 The growth of digital communications has driven the development of numerous cryptographic methods for secure data transfer and storage. The SHA-256 algorithm is a cryptographic hash function widely used for validating data authenticity, identity, and ...
Lucas Daudt Franck +4 more
doaj +1 more source