Reversible Information Hiding Algorithm Based on Multikey Encryption

Table 2

SSIM table of Lena.

1.2 pt	5 bits	6 bits	7 bits	8 bits	9 bits	10 bits
	1.0000	1.0000	1.0000	1.0000	1.0000	1.0000
	1.0000	0.9999	1.0000	0.9999	0.9997	0.9992
	0.9987	0.9985	0.9968	0.9978	0.9938	0.9942

, , and are the size of each block. 5 bits, 6 bits,…, 10 bits are how much of secret information embedded in each block.