AdamWhiteHat

public static class BigIntegerExtensionMethods
{
    public static BigInteger Sum(this IEnumerable<BigInteger> source)
    {
        return source.Aggregate((accumulator, current) => accumulator + current);
    }
    
    public static BigInteger Product(this IEnumerable<BigInteger> source)
    {
        return source.Aggregate((accumulator, current) => accumulator * current);

AdamWhiteHat

public static class HashCodeHelper
{
    public static int Combine(int h1, int h2)
    {
        uint num = (uint)((h1 << 5) | (int)((uint)h1 >> 27));
        return ((int)num + h1) ^ h2;
    }
}

tuxxy

#!/usr/bin/env python3
from Cryptodome.PublicKey import RSA


# A proof of concept demo showing the multiplicative limited
# homomorphic qualities of unpadded RSA
# (Unpadded RSA is not secure by modern standards)

def gen_key(size):
    key = RSA.generate(size)

AdamWhiteHat