Survey on Image Encryption, Data Hiding and Secret Fragment Visible Mosaic Image Creation Techniques
So many skillful techniques are present for protection of confidential images from unauthorized access. Visual cryptography and data hiding are mainly used methods for secure transmission. But main problem of this method is that, during recovering stage exact image that send will not be retrieved. Small amount of distortion may occur. Some areas like medicine, military fields; small distortion of image may cause large problems. To avoid this, another secure method called secret fragment visible mosaic image is used. This paper surveys these three methods for secure image transmission. Advantage and disadvantages of these methods are pointed out. Comparisons are done to find out efficient technique that produces less distortion of image during recovery. Keywords— image encryption; chaotic encryption; data hiding; reversible data hiding; secret fragment visible mosaic images