An Enhance Approach for Invisible Watermark for Digital Images to Watermark Image Text Data

Invisible watermarks are mainly used to hide the information in an image. It is the science of secret communication. The goal of invisible watermark is to hide the existence of the message from unauthorized party. The modern secure image invisible watermark presents a task of transferring the embedded information to the destination without being detected by the attacker. Many different carrier le formats can be used, but digital images are the most popular because of their frequency on the Internet. For hiding secret information in images, there exist a large variety of steganographic techniques some are more complex than others and all of them have respective strong and weak points. The proposed work purposed an image based invisible watermark that Least Significant Bits (LSB) techniques and pseudo random encoding technique on images to enhance the security of the communication. In the L-SB approach, the basic idea is to replace the Least Significant Bits (LSB) of the cover image with the Bits of the messages to be hidden without destroying the property of the cover image significantly. The LSB-based technique is the most challenging one as it is difficult to differentiate between the cover-object and water-object if few LSB bits of the cover object are replaced. In Pseudo-Random technique, a random-key is used as seed for the Pseudo-Random Number Generator is needed in the embedding process. Both the techniques used a water-key while embedding messages inside the cover image. By using the key, the chance of getting attacked by the attacker is reduced.