public static UInt16 Decrypt(ElGamalKey key, KeyValuePair <ushort, ushort> decrypted)
{
var apx = (UInt16)PrimitiveUtilities.ModularPower(decrypted.Key, key.P - 1 - key.X, key.P);
var bapx = (UInt16)((decrypted.Value * apx) % key.P);
return(bapx);
}
public static KeyValuePair <UInt16, UInt16> EncryptKey(ElGamalKey key, UInt16 value)
{
Random random = new Random();
var k = random.Next(1, key.P - 1);
var a = (UInt16)PrimitiveUtilities.ModularPower(key.G, k, key.P);
var b = (UInt16)PrimitiveUtilities.ModularPower(key.Y, k, key.P);
var c = (b * value) % key.P;
return(new KeyValuePair <ushort, ushort>(a, (UInt16)c));
}
