Image Encryption Using the Chaotic Josephus Matrix

Table 2

NPCR and UACI analyses on “Lena” image.

CPJM size	16-by-16	32-by-32	64-by-64	128-by-128	256-by-256
NPCR %	99.6170	99.6246	99.5895	99.5850	99.6338
UACI %	33.8205	33.8379	33.4048	33.4076	33.4040