Results 241 to 250 of about 24,651,562 (272)

A New Message Expansion Structure for Full Pipeline SHA-2

IEEE Transactions on Circuits and Systems I: Regular Papers, 2021
Once there are constant or infrequently changed bits (COIBs) in two adjacent input messages of SHA-2, the switching power of input messages data registers (IMD-REGs) used for COIBs will disappear. Meanwhile, when full pipeline SHA-2 is applied in a certain application scenario where the IMD-REGs used for COIBs can be removed, more area of full pipeline
Yin Zhang, Zhangqing He, Meilin Wan, Muwen Zhan, Ming Zhang 0035, Kuang Peng, Min Song, Haoshuang Gu   +7 more
openaire   +1 more source

On Collisions of Hash Functions Turbo SHA-2. [PDF]

IACR Cryptol. ePrint Arch., 2008
In this paper we don\u27t examine security of Turbo SHA-2 completely; we only show new collision attacks on it, with smaller complexity than it was considered by Turbo SHA-2 authors.
Vlastimil Klima
core   +3 more sources

SHA-2 hardware core for virtex-5 FPGA

2015 IEEE 12th International Multi-Conference on Systems, Signals & Devices (SSD15), 2015
Hash functions play an important role in modern cryptography. They are widely used to provide services of data integrity and authentication. The hash algorithms are based on performing a number of complex operations on the input data that require a significant amount of computing resources especially when the input data are huge.
Mohamed Anane, Nadjia Anane
openaire   +2 more sources

Optimisation of the SHA-2 Family of Hash Functions on FPGAs

IEEE Computer Society Annual Symposium on Emerging VLSI Technologies and Architectures (ISVLSI'06), 2006
Hash functions play an important role in modern cryptography. This paper investigates optimisation techniques that have recently been proposed in the literature. A new VLSI architecture for the SHA-256 and SHA-512 hash functions is presented, which combines two popular hardware optimisation techniques, namely pipelining and unrolling.
Robert P. McEvoy, Francis M. Crowe, Colin C. Murphy, William P. Marnane   +3 more
openaire   +2 more sources

New Local Collisions for the SHA-2 Hash Family

2007
The starting point for collision attacks on practical hash functions is a local collision. In this paper, we make a systematic study of local collisions for the SHA-2 family. The possible linear approximations of the constituent Boolean functions are considered and certain impossible conditions for such approximations are identified.
Somitra Kumar Sanadhya, Palash Sarkar 0001   +1 more
openaire   +3 more sources

Implementation of the SHA-2 Hash Family Standard Using FPGAs

The Journal of Supercomputing, 2005
zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Nicolas Sklavos 0001, Odysseas G. Koufopavlou   +1 more
openaire   +2 more sources

Memory optimization of HMAC/SHA-2 encryption

2014 First International Conference on Computational Systems and Communications (ICCSC), 2014
Society is undergoing a paradigm shift where the Information and Communication Technology revolution goes along with the evolution of the humankind The Internet is all around us and plays a crucial role in our ability to communicate We often distribute our personal and other classified information using the benefits of the global network Our demands to
R S Rubayya, R Resmi
openaire   +1 more source

First Full-Fledged Side Channel Attack on HMAC-SHA-2

2021
Side-channel attacks pose a threat to cryptographic algorithms. Hash functions, in particular those from the SHA-2 family, can also be an interesting target if some of their inputs are secret. HMAC is an important use case of a hash function, in which the input is partially secret and thus unknown to the attacker.
Yaacov Belenky, Ira Dushar, Valery Teper, Hennadii Chernyshchyk, Leonid Azriel, Yury Kreimer   +5 more
openaire   +2 more sources

A combinatorial analysis of recent attacks on step reduced SHA-2 family

Cryptography and Communications, 2009
zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Somitra Kumar Sanadhya, Palash Sarkar 0001   +1 more
openaire   +2 more sources

Avoiding Data Replication in Cloud Using SHA-2

2018 Internat2018 International Conference on Computation of Power, Energy, Information and Communication (ICCPEIC)ional conference on computation of power, energy, Information and Communication (ICCPEIC), 2018
Duplication occurs in cloud when two or more users try to upload same data who are working under a same organization. Deduplication is a process of avoiding the redundant data from the cloud. In previous systems they have used MD5 algorithm, which avoids performs on both file and content level de-duplication check.
R. Raju, S. Aravind Kumar, R. Manikandan
openaire   +1 more source