Mimic Encryption Box for Network Multimedia Data Security

Algorithm 1

KOA multiplication.

	Input: A, B, n//n is the bit width
	Output: C
(1)	if (n = = 64) return C = A × B;
(2)	;
(3)	;
(4)	C1 = KOA (A^H, B^H, n/2);
(5)	C2 = KOA (A^L, B^L, n/2);
(6)	C3 = KOA (A^H + A^L, B^H + B^L, n/2);
(7)	C = C1 << n + (C3 – C2 – C1) << (n/2) + C2;