npm package discovery and stats viewer.

Discover Tips

  • General search

    [free text search, go nuts!]

  • Package details

    pkg:[package-name]

  • User packages

    @[username]

Sponsor

Optimize Toolset

I’ve always been into building performant and accessible sites, but lately I’ve been taking it extremely seriously. So much so that I’ve been building a tool to help me optimize and monitor the sites that I build to make sure that I’m making an attempt to offer the best experience to those who visit them. If you’re into performant, accessible and SEO friendly sites, you might like it too! You can check it out at Optimize Toolset.

About

Hi, 👋, I’m Ryan Hefner  and I built this site for me, and you! The goal of this site was to provide an easy way for me to check the stats on my npm packages, both for prioritizing issues and updates, and to give me a little kick in the pants to keep up on stuff.

As I was building it, I realized that I was actually using the tool to build the tool, and figured I might as well put this out there and hopefully others will find it to be a fast and useful way to search and browse npm packages as I have.

If you’re interested in other things I’m working on, follow me on Twitter or check out the open source projects I’ve been publishing on GitHub.

I am also working on a Twitter bot for this site to tweet the most popular, newest, random packages from npm. Please follow that account now and it will start sending out packages soon–ish.

Open Software & Tools

This site wouldn’t be possible without the immense generosity and tireless efforts from the people who make contributions to the world and share their work via open source initiatives. Thank you 🙏

© 2024 – Pkg Stats / Ryan Hefner

snarkyjs-elgamal

v0.0.9

Published

This repository implements Elgmal, a partial homomorphic encryption scheme originally described by [Taher Elgamal in 1985](https://caislab.kaist.ac.kr/lecture/2010/spring/cs548/basic/B02.pdf). This implementation includes the original version of Elgamal,

Downloads

76

Readme

SnarkyJS Elgamal

This repository implements Elgmal, a partial homomorphic encryption scheme originally described by Taher Elgamal in 1985. This implementation includes the original version of Elgamal, which is multiplicative homomorphic, as well as slightly modified versions called Exponential Elgamal, which is multiplicative homomorphic over the cipher space, but additive homomorphic over the plain text space, and a version implementing Elgamal on elliptic curves.

ElGamal over a finite field

Usage

Install the package npm i snarkyjs-elgamal

Import the ElGamal finite field class as well as the cipher class.

import { Cipher, ElGamalFF } from 'snarkyjs-elgamal';

Generate a secret and public key. The secret key is used to decrypt, whereas the public key is used to encrypt a message.

let { pk, sk } = ElGamalFF.generateKeys();

Encrypt two messages using the public key.

let c1 = ElGamalFF.encrypt(Field(5), pk)
let c2 = ElGamalFF.encrypt(Field(5), pk)

Demonstrate the multiplicative homomorphism over the plain text space by multiplying the ciphers.

let c3 = c1.mul(c2)

Decrypt the cipher c3 using the secret key.

let plain = ElGamalFF.decrypt(c3, sk);

Check that the decrypted text equals the expected output of 5 * 5 = 25.

plain.assertEquals(Field(5).mul(5));

Usage in a Mina smart contract

Take a look at at the example which uses ElGamal within a Mina smart contract.

ElGamal over an elliptic curve

TBD

How to build

npm install
npm run build
npm run test
node build/src/examples/elgamalff.js

License

Apache-2.0