IRDM watermarking with EMRC6 encryption for DRM system

The information in the digital form encounters various form of attacks while it is being sent through the communication channel. To withstand the attacks the information has to be secured by any one of the security mechanism. Digital Right Management (DRM) system is one where the right of ownership, authentication and integrity of the information and such other safety protocols are maintained. This paper consists of a working model for DRM system that is a combination of Improved Rational Dither Modulation (IRDM) for watermarking and Enhanced Modified Rivet Cipher 6 (EMRC6) for encryption. Since both the watermarking and encryption schemes are integrated together, this model provides a high level of security thus making the DRM system more robust. The input information can be either text or two dimensional image but this model can be extended to multidimensional information also. IRDM is a frequency domain scheme and is used for improving the robustness of the watermarking system. When compared to its predecessor RDM, IRDM is resistant to all attacks on watermark information and especially to scaling attack. The EMRC6 encryption scheme is a block ciphering method that is faster than the other version of RC6 and it has no attack. Hence it provides a high level of security to the information. The information from the output of this model ensures that the output digital image does not have any visual artifact since the PSNR value is around 41 dB on an average and the correlation coefficient is near to zero. The encryption time is very low and the throughput is high thus concluding that the working model is very fast.