Abstract
The majority of imaging techniques use symmetric and asymmetric cryptography algorithms to encrypt digital media. Most of the research works contributed in the literature focus primarily on the Advanced Encryption Standard (AES) algorithm for encryption and decryption. This paper propose an analysis for performing image encryption and decryption by hybridization of Elliptic Curve Cryptography (ECC) with Hill Cipher (HC), ECC with Advanced Encryption Standard (AES) and ElGamal with Double Playfair Cipher (DPC). This analysis is based on the following parameters: (i) Encryption and decryption time, (ii) entropy of encrypted image, (iii) loss in intensity of the decrypted image, (iv) Peak Signal to Noise Ratio (PSNR), (v) Number of Pixels Change Rate (NPCR), and (vi) Unified Average Changing Intensity (UACI). The hybrid process involves the speed and ease of implementation from symmetric algorithms, as well as improved security from asymmetric algorithms. ECC and ElGamal cryptosystems provide asymmetric key cryptography, while HC, AES, and DPC are symmetric key algorithms. ECC with AES are perfect for remote or private communications with smaller image sizes based on the amount of time needed for encryption and decryption. The metric measurement with test cases finds that ECC and HC have a good overall solution for image encryption.
Highlights
An image provides a lot of information
The different performance metrics measured in our work evaluate the security of the encryption provided by the hybrid algorithm to an input image
Using the entropy and Peak Signal to Noise Ratio (PSNR) measurement value, Elliptic Curve Cryptography (ECC) with Advanced Encryption Standard (AES) and ECC with Hill Cipher introduce significantly high randomness in image encryption compared to ElGamal with Double Playfair cipher algorithms
Summary
An image provides a lot of information. Almost one-third of our cortical brain region is dedicated to the visual processing of the perceived information. Images are a significant source of information. Digital communication generates millions of digital data in the form of digital images. Cryptography is an efficient way to safeguard sensitive information. Cryptography is a method of storing and transmitting data in a form intended for reading and processing the information. The advancement of encryption and decryption leads to an infinite future. There are three different hybrid methods for performing image encryption and decryption. The key generation of ECC and background process describes the hybrid algorithms mentioned below. The overview of an Elliptical Curve Cryptography is specified. Elliptical curves are used across a finite prime field.
Sign-in/Register to view highlights & summary 
Published Version (
Free)
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call