A modified image watermarking method using logistics and rsa algorithm

Abstract

In the current era due to the increasing growth of multimedia data it is necessary to protect them, as they are subjected to cyber-attacks like ransomware, trojan, viruses etc. This can affect the confidentiality and integrity of the confidential data transmitted by private and government organizations over the internet. To protect such data digital watermarking is used highly nowadays. Embedding data intodigital signals like images, audios and videos in the form of digital watermarking copyright information by which the header of data block or synchronization of time is adapted to mark data. Most of the existing watermarking algorithm encrypts the watermark image using RSA, but this is a time-consuming process. Several other existing techniques like Arnold transformation, LSB, DWT etc. fail to address all the security requirements. This paper puts forth a modified watermarking system that uses RSA encryption algorithm and Scrambling Logistic algorithm. In it the watermark image is encrypted by using Logistic and RSA technique is used for encrypting the scrambling parameters. The host image is decomposed by Integer Wavelet Transform (IWT) and SV Decomposition (SVD) and the watermark image is then incorporated into it. This system has a much higher computational efficiency, robustness and embedding capacity compared to the existingtechniques.