Pengamanan Gambar Digital dengan Menggunakan Algoritma Kriptografi SHA-3 Keccak, Skema Chaos, dan DNA Encoding

Abstract

Security is an essential aspect to consider during data transmission, especially images. Threats that may occur during image transmission include images being stolen by third parties. One way to secure images is through encryption-decryption processes using cryptographic algorithms. One of the algorithms developed for image security involves combining chaos scheme, DNA encoding, and hashing. Chaos scheme refers to a system sensitive to initial conditions, resulting in behavior that is difficult to predict or appears random. DNA encoding is the process of converting bits into a DNA sequence. Hashing is a mathematical function which takes variable inputs and converts them into a binary sequence with fixed length. In this research, security enhancement is achieved by replacing the hashing algorithm with SHA 3 Keccak. This study successfully implements cryptographic algorithms into a website that can simulate image encryption-decryption processes in about 15 seconds per process. The effectiveness of the algorithm used has also been tested in abstracting images through MSE and PSNR evaluations. MSE and PSNR evaluations show value 0 and infinity which means the original image and decrypted image is identical.