ceremonyclient/nekryptology/pkg/paillier/README.md
2023-07-05 00:32:28 -05:00

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# 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 keypair
- 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.