Amount of information which can be stored within the images, and the movement of images over open network takes to the problem of image theft and breach of confidentiality. To prevent the loss of information from images, it leads the idea of image encryption in which various researchers are trying to encrypt image in such a way that un-authorized users should not be able to access the information kept within image, and for the same purpose researchers have proposed different image encryption techniques with confusing features to keep the images secure when they are moving over open networks. So, in the chain of existing work, we are purposing an image encryption method which is using block formation within the image, and each block is then used in zigzag manner followed by interpixel displacement of RGB values within that zigzag area of the block. The block sizes can vary from image to image and this is part of the key.