| In recent years, the research and application of meteorological information have become areas of significant attention, with meteorological information systems serving as critical support systems in the transportation industry. The marine weather fax system primarily disseminates meteorological information via radio facsimile. However, due to the openness of maritime wireless communication channels, there is a risk of weather fax information being tampered with, potentially leading to the dissemination of incorrect information, thereby affecting decision-making and emergency response actions. To address this issue, this paper proposes a robust and reliable authentication watermarking technique in the Discrete Wavelet Transform (DWT) domain, combining asymmetric encryption and Quick Response (QR) code-based methods, named the RSA-QR-DWT algorithm. The algorithm first utilizes the RSA algorithm to generate a private key to encrypt identity information, embeds the encrypted identity information into a QR code, and then embeds the QR code into the DWT domain of the weather image. Experimental results show that this algorithm ensures image quality while demonstrating robustness, effectively resisting various attacks, thereby guaranteeing the authenticity and security of meteorological information. Compared to traditional QR code authentication methods based on the Least Significant Bit (LSB) algorithm, the RSA-QR-DWT algorithm shows significant advantages in robustness, being better equipped to resist rotation-cropping attacks, compression attacks, and certain levels of noise attacks. |
