Paillier cryptosystem

[littleli]

I put together an example of a (partial-)homomorphic cryptosystem (Paillier, 1999). It's a probabilistic and asymmetric cryptosystem with beneficial properties. It works with Clojure and Babashka (requires 0.3.5 and above).

Flythrough usage:

• Create a key-pair
• Encrypt a message (text or number) with a public-key
• Decrypt a message (text or number) with a private-key
• Add together two ciphertexts (numbers) without decrypting them
• Multiply a plaintext (number) with ciphertext (number)

The source is available here:
https://gist.github.com/littleli/9cf457a05fd925060d1e4a874834ad5e