Abstract
In this paper, we present an improvement of a previously proposed watermarking scheme. We proved in a previous work that the scheme suffers from security flaws and we exploited those flaws to attack the scheme resulting in the revelation of the secret keys used in the embedding process. With possession of the keys watermarked images could be manipulated without being detected by the extraction scheme. In this paper, we propose an improvement of the scheme to cover the security flaws in the scheme. This work falls into the context of improving the design of security systems taking into consideration the different cryptanalysis techniques. (C) 2022 The Authors. Published by IASE.