A New Type of Countermeasure against DPA in Multi-Sbox of Block Cipher

Table 8

The success rate of recovering key corresponding Sbox.

	Sequence of speculating Sbox	Guessing the value of key	Success rate
	1/8	1/64	(1/2)^9
	1/8	(1/64)^2	(1/2)^15
	1/8	(1/64)^3	(1/2)^21
	1/8	(1/64)^4	(1/2)^27
	1/8	(1/64)^5	(1/2)^33
	1/8	(1/64)^6	(1/2)^39
	1/8	(1/64)^7	(1/2)^45
	1/8	(1/64)^8	(1/2)^51