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https://github.com/herumi/she-wasm
Two-level homomorphic encryption for Node.js by WebAssembly
https://github.com/herumi/she-wasm
Last synced: 19 days ago
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Two-level homomorphic encryption for Node.js by WebAssembly
- Host: GitHub
- URL: https://github.com/herumi/she-wasm
- Owner: herumi
- Created: 2017-11-01T05:26:08.000Z (about 7 years ago)
- Default Branch: master
- Last Pushed: 2024-09-30T08:59:11.000Z (about 2 months ago)
- Last Synced: 2024-10-13T20:46:02.102Z (about 1 month ago)
- Language: JavaScript
- Size: 6.58 MB
- Stars: 62
- Watchers: 6
- Forks: 13
- Open Issues: 0
-
Metadata Files:
- Readme: readme.md
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README
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# Two-level homomorphic encryption for Node.js by WebAssembly
# Abstract
This library supports two kinds of lifted ElGamal encryption,
- which can add two ciphertexts many times, and
- can multiply two ciphertexts once.
For two vectors x = (x1, ..., xn) and y = (y1, ..., yn),
EncG1(x1) * EncG2(y1) + ... + EncG1(xn) * EncG2(yn) = EncGT(x1 * y1 + ... + xn * yn).
see [mcl](https://github.com/herumi/mcl)
# News
- 2023/Sep/06 The performance of enc/dec is a little improved.
- 2023/Aug/17 The performance of dec is a little improved.
- 2022/Jul/20 v1.0.0
- 2020/Dec/27 change file layout
- 2020/Dec/18 `sec.decWithZkpDec(c, aux)` returns `[m, zkp]` that `zkp` proves `dec(c) = m` for CipherTextGT c, and `aux.verify(c, zkp, m)` returns the correctness where `aux = pub.getAuxiliaryForZkpDecGT()`.
- 2020/Nov/06 `sec.decWithZkpDec(c, pub)` returns `[m, zkp]` that `zkp` proves `dec(c) = m` for CipherTextG1 c, and `pub.verify(c, zkp, m)` returns the correctness.
# Demo
* [cross tabulation demo](https://herumi.github.io/she-wasm/browser/cross-demo.html)
* [cross tabulation demo (Japanese)](https://herumi.github.io/she-wasm/browser/cross-demo-ja.html)
# for Node.js
```
node test
```
# How to use
The version `v0.7.0` breaks backward compatibility of the entry point.
- Node.js : `const she = require('she-wasm')`
- React : `const she = require('she-wasm/browser')`
- HTML : ``
# Doc
* [_Efficient Two-level Homomorphic Encryption in Prime-order Bilinear Groups and A Fast Implementation in WebAssembly_](https://dl.acm.org/citation.cfm?doid=3196494.3196552), N. Attrapadung, G. Hanaoka, S. Mitsunari, Y. Sakai,
K. Shimizu, and T. Teruya. ASIACCS 2018
* [slide for ASIA CCS 2018 in English](https://www.slideshare.net/herumi/efficient-twolevel-homomorphic-encryption-in-primeorder-bilinear-groups-and-a-fast-implementation-in-webassembly)
* [slide for SCIS 2018 in Japanese](https://www.slideshare.net/herumi/2scis2018)
* [she-api](https://github.com/herumi/mcl/blob/master/misc/she/she-api.md)
* [she-api(Japanese)](https://github.com/herumi/mcl/blob/master/misc/she/she-api-ja.md)
# How to build
Install [Emscripten](https://emscripten.org/).
```
git submodule update --init --resurcive
cd src
make
```
# License
modified new BSD License
http://opensource.org/licenses/BSD-3-Clause
# Author
MITSUNARI Shigeo([email protected])
# Sponsors welcome
[GitHub Sponsor](https://github.com/sponsors/herumi)