Separable Reversible Data Hiding in Encrypted Images Based on Difference Histogram Modification

Table 1

Comparison of histogram statistics.

	Original Image			Encrypted Image
	Mean	Standard Deviation	Median	Mean	Standard Deviation	Median
Lena	134.40	41.51	141	127.05	73.97	127
Baboon	129.15	42.30	130	127.33	73.78	127
Barbara	126.59	72.06	127	127.55	74.10	127
Peppers	104.21	57.40	108	127.55	73.84	127
Boat	136.13	52.32	158	127.51	73.93	127
Truck	106.39	34.97	109	127.42	73.89	127
Airplane	179.20	45.12	200	127.10	73.92	127
Man	77.82	58.25	74	127.80	73.99	127