Results 31 to 40 of about 10,407,854 (368)

Non-Relaxation Deep Hashing Method for Fast Image Retrieval

IEEE Access, 2023
Deep hashing methods utilize an end-to-end framework to mutually learn feature representations and hash codes, thereby achieving a better retrieval performance.
Xiaofei Li
doaj   +1 more source

Theoretical and Experimental Analysis of Cryptographic Hash Functions

Journal of Telecommunications and Information Technology, 2019
The paper presents a theoretical introduction to the cryptographic hash function theory and a statistical experimental analysis of selected hash functions.
Jacek Tchórzewsk, Agnieszka Jakóbik (Krok)   +1 more
doaj   +1 more source

From Graphs to Keyed Quantum Hash Functions [PDF]

, 2016
We present two new constructions of quantum hash functions: the first based on expander graphs and the second based on extractor functions and estimate the amount of randomness that is needed to construct them.
Ziatdinov, Mansur
core   +2 more sources

Challenging the increased resistance of regular hash functions against birthday attacks

Journal of Mathematical Cryptology, 2012
At Eurocrypt 2004, Bellare and Kohno presented the concept of a regular hash function. For a hash function to be regular, every hash value must have the same number of preimages in the domain.
Mouha Nicky, Sekar Gautham, Preneel Bart
doaj   +1 more source

Design and Analysis of New Version of Cryptographic Hash Function Based on Improved Chaotic Maps With Induced DNA Sequences

IEEE Access, 2023
One of the first and most used hashing algorithms in blockchains is SHA-256 so the main aim of this paper is how to increase the security level of the blockchain based on the increasing hashing algorithm security.
Salwa M. Serag Eldin, Ahmed A. Abd. El-Latif, Samia A. Chelloug, Musheer Ahmad, Ahmed H. Eldeeb, Tamer O. Diab, Wageda I. Al Sobky, Hany Nasry Zaky   +7 more
doaj   +1 more source

Hash functions for priority queues

24th Annual Symposium on Foundations of Computer Science (sfcs 1983), 1983
The complexity of priority queue operations is analyzed with respect to the cell probe computational model of A. Yao (J. Assoc. Comput. Mach. 28, No. 3 (1981), 615–628). A method utilizing families of hash functions is developed which permits priority queue operations to be implemented in constant worst-case time provided that a size constraint is ...
M. Fredman, János Komlós, M. Ajtai
openaire   +3 more sources

Finding state-of-the-art non-cryptographic hashes with genetic programming [PDF]

, 2006
Proceding of: 9th International Conference, Reykjavik, Iceland, September 9-13, 2006.The design of non-cryptographic hash functions by means of evolutionary computation is a relatively new and unexplored problem.
Estébanez Tascón, César, Hernández, Julio C., Isasi, Pedro, Ribagorda, Arturo   +3 more
core   +2 more sources

EliMAC: Speeding Up LightMAC by around 20%

IACR Transactions on Symmetric Cryptology, 2023
Universal hash functions play a prominent role in the design of message authentication codes and the like. Whereas it is known how to build highly efficient sequential universal hash functions, parallel non-algebraic universal hash function designs are ...
Christoph Dobraunig, Bart Mennink, Samuel Neves   +2 more
doaj   +1 more source

Regular and almost universal hashing: an efficient implementation [PDF]

, 2016
Random hashing can provide guarantees regarding the performance of data structures such as hash tables---even in an adversarial setting. Many existing families of hash functions are universal: given two data objects, the probability that they have the ...
Ignatchenko, Sergey, Ivanchykhin, Dmytro, Lemire, Daniel   +2 more
core   +2 more sources

Secure Parallel Image Cryptographic Hash Function Using a Novel 2D High-Randomness Hyperchaotic Map

Mathematics
For image data, the processing of each pixel using a cryptographic hash function is linear, and the existing cryptographic hash function lacks parallel processing of image width and height.
Mingrui Qi, Dongdong Wang
doaj   +1 more source