Trap Networks

O, it is excellent
To have a giant's strength; but it is tyrannous
To use it like a giant.
		-- Shakespeare, "Measure for Measure", II, 2

$where {p,q} are prime, n = pq, ed is congruent to 1 mod ((p-1)(q-1)), C = M^e(mod n), M = C^d(mod n)$