A High-Quality Authenticatable Visual Secret Sharing Scheme Using SGX

Table 3

Generate pixel blocks by rolling.

Rows to roll	Pixel block	Number of permutations
0	[B, B, B, B]	24
1	[B, B, B, W]	6
2	[W, B, B, W]	4
3	[W, W, W, B]	6
4	[W, W, W, W]	24