Image Encryption using Edge Map and Key Image

Objective: An Image Encryption algorithm is proposed which uses an image as key and concept of Edge Map for Encryption. Method/Analysis: The proposed algorithm uses gradient operators like Sobel, Roberts, Prewitt and Canny edge detectors for generating the edge map of key image and which is used for encrypting the original image with xor operation. Findings: The encrypted image shows remarkable difference from the actual image which is shown in the histogram analysis and other statistical tests. Conclusion/Applications: The proposed algorithm achieves considerable level of encryption, which makes it suitable to be used in different applications. It is used for protection of images against various kinds of common attacks like brute force attacks.