The EzStego algorithm based on the palette images is studied

and the well known χ2and RS are analyzed based on whichwe pointed out the irdisadvantages when they are used to detect the lower embedding rate images processed by EzStego. Color pairs and sequential embedding are two characters of EzStego

according to which a new method is proposed. Experimental results show that this method works well for detecting stego images of Ezstego and can achieve better performance comparing to both χ2 and RS in case of detecting little embedded stego images.