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Modular multiplicative inverse

Tool to compute the modular inverse of a number. The modular multiplicative inverse of an integer N modulo m is an integer n such as the inverse of N modulo m equals n.

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Modular multiplicative inverse -

Tag(s) : Cryptography,Substitution Cipher

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# Modular multiplicative inverse

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## Modular Inverse Calculator

Tool to compute the modular inverse of a number. The modular multiplicative inverse of an integer N modulo m is an integer n such as the inverse of N modulo m equals n.

## Answers to Questions

### How to calculate a modular inverse?

dCode uses the Extended Euclidian algorithm and arbitrary precision functions to get resulsts with bg integers.

3^-1 mod 11 is equivalent to 4 because 4x3 = 12 and 12 is equivalent to 1 modulo 11.

The Euclidean algorithm is similar to that used in the calculation of GCD or the identity of Bezout.

### What is the modular Inverse?

The value of the inverse modular of a by the modulus n is the value u such as $$u \equiv a^{-1} \pmod n$$ $$a u \equiv1 \pmod n$$

### What does invmod mean?

The keyword invmod is the abbreviation of inverse modular.

## Source code

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## Questions / Comments

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