The increasing prevalence of cyber-attacks calls for advanced solutions for secure data exchange, particularly in the area of image sharing. This paper focuses on creating a secure framework for image communication by utilizing homomorphic watermarking techniques. A comprehensive approach for securely transmitting images via cloud servers, drawing on the advantages of 2D-Discrete Wavelet Transform (2D-DWT) and homomorphic encryption is presented. In proposed method, first 2D-DWT is applied to break down the image into unique coefficients, which we then encrypt using homomorphic techniques to bolster security. To safeguard intellectual property, a watermark is also incorporated into the image. The proposed approach has been effectively deployed and assessed, demonstrating encouraging outcomes in both security and data fidelity. Performance evaluation is carried out using three primary metrics: Peak Signal-to-Noise Ratio (PSNR), Structural Similarity Index (SSIM), and Mean Squared Error (MSE). The result analysis also examined how the algorithm performs under different cryptographic key lengths and image sizes. The findings indicate high-quality image output coupled with reasonable computational demands, positioning proposed methodology as a practical choice for secure and efficient image transmission.

Secure Communication, Image Encryption, Watermarking, Homomorphic Encryption.