Image Authentication via Zero-Watermarking based on a Unidimensional Cellular Automata

This paper presents a zero-watermarking algorithm for authentication of digital images. The main challenge in every zero-watermarking algorithm is to create a scheme with high payload, reliable, secure and that avoid any distortion into the content image. Using a secure hash algorithm, spread spectrum by direct sequence code division multiple access, cellular automata criterion and image processing, the algorithm obtains a zero-watermarking code used to authenticate the ownership and verify the integrity of the digital image. Experimental results show the effectiveness of the proposed method to prove the ownership authentication and integrity content verification, making the proposed scheme suitable in applications where the image manipulations are not allowed, such as evidence proves or medical images.