Table 5.

NPCR test for cryptogram of Lena image $512\times 512\times 3$ pixels using n processes and Tinkerbell map [73].

Cryptogram Size		Critical NPCR Values [88]
$512\times 512\times 3$		${\mathit{N}}_{\mathbf{0.05}}$ = 99.5893%,	${\mathit{N}}_{\mathbf{0.01}}$ = 99.5810%,	${\mathit{N}}_{\mathbf{0.001}}$ = 99.5717%,
n Process	Average NPCR(%)	NPCR Test Result
FIAD cluster (1.2 GHz)
1	$99.6029$	Passed	Passed	Passed
2	$99.5925$	Passed	Passed	Passed
4	$99.5900$	Passed	Passed	Passed
8	$99.5908$	Passed	Passed	Passed
16	$99.5884$	Failed	Passed	Passed
32	$99.5930$	Passed	Passed	Passed
64	$99.5908$	Passed	Passed	Passed
128	$99.5749$	Failed	Failed	Passed
CPU (2.7) GHz
1	$99.6028$	Passed	Passed	Passed
2	$99.5924$	Passed	Passed	Passed
4	$99.5900$	Passed	Passed	Passed
8	$99.5908$	Passed	Passed	Passed
16	$99.5883$	Failed	Passed	Passed
32	$99.5929$	Passed	Passed	Passed
64	$99.5908$	Passed	Passed	Passed
128	$99.5749$	Failed	Failed	Passed