# modular arithmetic

Also found in: Encyclopedia, Wikipedia.

## modular arithmetic

n.
A form of integer arithmetic in which all integers having the same remainder when divided by a given natural number (called the modulus) are considered equivalent: Clocks use modular arithmetic with modulus 12, so 4 hours after 9 o'clock is 1 o'clock.
Translations
arithmétique modulaire
Mentioned in ?
References in periodicals archive ?
'Can you tell an equation has an integer solution by collecting data from modular arithmetic' Zhang investigates whether and how an equation can be solved by restoring this local data to a global piece of information - like finding a Pythagorean triple.
The main bottleneck of public key algorithms is that they are slower compared to symmetric-key simply because of their foundation in modular arithmetic. Hence, how to make a faster and more efficient implementation of public key algorithms such as RSA is a challenge to researchers in cryptography field.
* Charlie Du, a CCHS freshman, who was admitted to AwesomeMath at the University of Texas-Dallas campus, where he will focus on coursework in computational geometry and modular arithmetic.
Several applications in cryptography such as ciphering and deciphering of asymmetric algorithms, the creation and verification of digital signatures, and secure key exchange mechanisms require excessive use of the basic finite field modular arithmetic operations addition, multiplication, and the calculation of the multiplicative inverse.
RSA is heavily based on the modular arithmetic of large integers and the whole RSA includes three parts: key generation, encryption and decryption process.
His topics are integers, modular arithmetic, quadratic reciprocity and primitive roots, secrets, arithmetic functions, algebraic numbers, rational and irrational numbers, diophantine equations, elliptic curves, dynamical systems, and polynomials.
"Cracking Codes with Python" also shows how to: Combine loops, variables, and flow control statements into real working programs; Use dictionary files to instantly detect whether decrypted messages are valid English or gibberish; Create test programs to make sure that your code encrypts and decrypts correctly; Code (and hack!) a working example of the affine cipher, which uses modular arithmetic to encrypt a message; Break ciphers with techniques such as brute-force and frequency analysis.
Key words: Modular Arithmetic, Congruence, Divisibility, b-adic expension.
An exam on modular arithmetic was elaborated in both paper and electronic formats (with the same questions) to measure the effects of the treatments on students' outcomes.
(1) Algorithms often are based on modular arithmetic, and a simple example illustrates the idea.
My favourite sessions were Modular Arithmetic and Continued Fractions.

Site: Follow: Share:
Open / Close