The rise in digital communication and cloud-based data sharing has elevated the importance of securing multimedia content, particularly images. This study introduces a novel image scrambling and encryption technique based on M-sequences, aiming to ensure high-level security during image storage and transmission. The proposed method utilizes linear feedback shift registers (LFSRs) to generate M-sequences, which are then applied to scramble pixel positions and intensities. Additionally, a graphical user interface (GUI) is developed to facilitate user-friendly encryption and decryption processes. Unlike traditional chaotic approaches that are vulnerable to cryptanalysis such as chosen-plaintext attacks, the proposed system embeds key generation tightly with image characteristics, significantly improving resistance against modern threats. Simulation results validate the accuracy, speed, and robustness of the system, making it a promising candidate for secure image applications in cloud environments.