Cryptanalysis of the Lightweight Block Cipher BORON

Algorithm 4

Difference propagations through S-boxes.

r: the number of rounds
: output of the S-box with the input x
(1)	for to r do
(2)	for to 15 do
(3)	for to 15 do
(4)
(5)
(6)	end for
(7)	end for
(8)	end for
(9)
(10)	for to r do
(11)	for to 15 do
(12)	before_sbox_difference_i_j
(13)	= before_sbox_value1_i_j  before_sbox_value2_i_j
(14)	after_sbox_difference_i_j
(15)	= after_sbox_value1_i_j  after_sbox_value2_i_j
(16)	end for
(17)	end for