Results 21 to 30 of about 169,709 (230)

Logarithm of the Discrete Fourier Transform

open access: yesInternational Journal of Mathematics and Mathematical Sciences, 2007
The discrete Fourier transform defines a unitary matrix operator. The logarithm of this operator is computed, along with the projection maps onto its eigenspaces. A geometric interpretation of the discrete Fourier transform is also given.
Michael Aristidou, Jason Hanson
doaj   +1 more source

Quantum computation of discrete logarithms in semigroups

open access: yesJournal of Mathematical Cryptology, 2014
We describe an efficient quantum algorithm for computing discrete logarithms in semigroups using Shor's algorithms for period finding and the discrete logarithm problem as subroutines.
Childs Andrew M., Ivanyos Gábor
doaj   +1 more source

Logarithm of multivector in real 3D Clifford algebras

open access: yesNonlinear Analysis, 2023
Closed form expressions for a logarithm of general multivector (MV) in basis-free form in real geometric algebras (GAs) Clp,q are presented for all n = p + q = 3.
Artūras Acus, Adolfas Dargys
doaj   +1 more source

A kilobit hidden SNFS discrete logarithm computation [PDF]

open access: yes, 2016
We perform a special number field sieve discrete logarithm computation in a 1024-bit prime field. To our knowledge, this is the first kilobit-sized discrete logarithm computation ever reported for prime fields.
A Commeine   +22 more
core   +6 more sources

The discrete logarithm problem in Bergman's non-representable ring

open access: yesJournal of Mathematical Cryptology, 2012
Bergman's ring , parameterized by a prime number p, is a ring with p5 elements that cannot be embedded in a ring of matrices over any commutative ring. This ring was discovered in 1974.
Banin Matan, Tsaban Boaz
doaj   +1 more source

Cryptanalysis of the cryptosystems based on the generalized hidden discrete logarithm problem [PDF]

open access: yesComputer Science Journal of Moldova
In this paper, we will solve an important form of hidden discrete logarithm problem (HDLP) and a generalized form of HDLP (GHDLP) over non-commutative associative algebras (FNAAs). We will reduce them to discrete logarithm problem (DLP) in a finite field
Yanlong Ma
doaj   +1 more source

Quasi-subfield Polynomials and the Elliptic Curve Discrete Logarithm Problem

open access: yesJournal of Mathematical Cryptology, 2020
We initiate the study of a new class of polynomials which we call quasi-subfield polynomials. First, we show that this class of polynomials could lead to more efficient attacks for the elliptic curve discrete logarithm problem via the index calculus ...
Huang Ming-Deh   +4 more
doaj   +1 more source

Pairing-Free for Public Key Encryption With Equality Test Scheme

open access: yesIEEE Access, 2021
The modular exponentiation has been proved better in terms of computational efficiency as compared to bilinear pairing. Therefore, discrete logarithm, a concept of modular exponentiation may be incorporated to present improved security schemes. With this
Huijun Zhu   +3 more
doaj   +1 more source

Computing Small Discrete Logarithms Faster [PDF]

open access: yes, 2012
Computations of small discrete logarithms are feasible even in "secure" groups, and are used as subroutines in several cryptographic protocols in the literature. For example, the Boneh–Goh–Nissim degree-2-homomorphic public-key encryption system uses generic square-root discrete-logarithm methods for decryption.
Bernstein, D.J., Lange, T.
openaire   +2 more sources

A Tight Upper Bound for the Third-Order Asymptotics for Most Discrete Memoryless Channels [PDF]

open access: yes, 2013
This paper shows that the logarithm of the epsilon-error capacity (average error probability) for n uses of a discrete memoryless channel is upper bounded by the normal approximation plus a third-order term that does not exceed 1/2 log n + O(1) if the ...
Tan, Vincent Y. F., Tomamichel, Marco
core   +2 more sources

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