International Journal of Science, Engineering and TechnologyAuthors: Mrs.M.Lavanya, Yogeswaran R, Pragedeeswaran S, Palanivel M
Abstract: This project introduces an advanced dual-layer security framework that integrates steganography and digital watermarking to strengthen data confidentiality and ownership verification. The proposed system follows a two-stage security model: in the first stage, sensitive information is invisibly embedded within digital media such as images, audio, or video using steganographic techniques, while the second stage applies resilient watermarking methods to ensure copyright protection and verify content authenticity. Least Significant Bit (LSB) manipulation is utilized for efficient data concealment, and Discrete Wavelet Transform (DWT) or Discrete Cosine Transform (DCT) techniques are employed for robust watermark embedding. This combined approach delivers high embedding capacity along with strong resistance to common signal-processing and malicious attacks. The layered architecture guarantees continued protection even if one security layer is breached. Potential applications include secure data transmission, intellectual property protection, medical imaging security, and digital forensic analysis. Experimental results confirm improved imperceptibility, robustness, and overall security compared to conventional single-layer techniques, making the framework well suited for high-security and mission-critical applications.
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