---
aliases: [README]
tags: []
title: README
linter-yaml-title-alias: README
date created: Wednesday, April 17th 2024, 4:11:40 pm
date modified: Thursday, April 18th 2024, 8:19:25 am
---

## Paillier Cryptosystem

Package paillier contains [Paillier's cryptosystem (1999)](http://citeseerx.ist.psu.edu/viewdoc/download?doi=10.1.1.112.4035&rep=rep1&type=pdf).
All routines here from pseudocode §2.5. Fig 1: The Paillier Cryptosystem.

This module provides APIs for:

- generating a safe key pair
- encryption and decryption
- adding two encrypted values, `Enc(a)` and `Enc(b)`, and obtaining `Enc(a + b)`, and
- multiplying a plain value, `a`, and an encrypted value `Enc(b)`, and obtaining `Enc(a * b)`.

The encrypted values are represented as `big.Int` and are serializable.
This module also provides JSON serialization for the PublicKey and the SecretKey.