Image Encryption: A Hybrid Approach Based on ECC & Chaotic Maps

The rapid evolution of imaging and communication technologies has transformed images into a widespread data type. Different types of data such as personal medical information, official correspondence and military documents are transmitted in the form of images over public networks. Cryptography is a solution to protect confidential images by encrypting an image before transmission over public networks. To achieve a fast and secure cryptosystem for high-resolution images, a hybrid selective cryptosystem is proposed based on elliptic curve cryptography and chaotic maps. Selective encryption is a solution to decrease the consumed time which reduces the encryption regions as small as possible. This scheme will encrypt only confidential regions rather than whole image and guarantee the cryptosystem to work effectively and secure in real-time applications.