public static SecureWord Multiplex(SecureWord left, SecureWord right, SecureBoolean condition)
{
if (left.Builder != right.Builder || condition.Builder != right.Builder)
{
throw new ArgumentException("Secure words must use the same circuit builder for constructing gates.");
}
if (left.Length != right.Length)
{
throw new ArgumentException("Secure words must be of same length for multiplexing.");
}
Wire[] result = new Wire[right.Length];
for (int i = 0; i < right.Length; ++i)
{
result[i] = right.Builder.Xor(
left.Wires[i],
right.Builder.And(
condition.Wire,
right.Builder.Xor(left.Wires[i], right.Wires[i])
)
);
}
return(new SecureWord(right.Builder, result));
}
public static SecureInteger FromWord(SecureWord word)
{
return(new SecureInteger(word.Builder, word.Wires));
}