Nowadays, use of Internet and computer system/Applications are increasing drastically and attacks on Internet are growing significantly, became automated & complicated. To protect the information shared transmitted/stores on Internet, various security methods are use like Cryptography, watermarking and Stangnography. Digital watermarking is an art of underground the information related to Digital signal within the signal itself. There are main techniques for digital watermarking: Spatial Domain and Frequency Domain. The least Significant Bit algorithm is the Spatial Domain technique in which the watermark information is embedded in the least Significant bit of original work. In this paper we propose a new approach for Digital Inage watermarking, in which rather than embedding the watermark in Least Significant Bit position of the original work, we find the bit position in the original work where the value of original image and watermark image is same and note that position in Key file. If the information of watermark image do not find in the original work then we embedded the watermark image value at 1 st /2 nd /3 rd /4 th /5 th /6 th /7 th /8 th bit position of original work and store the corresponding bit position in Key file. This Key file will later be used to take out the watermark from the watermarked image. This is fragile & non-blind watermarking technique in which the watermark may be destroying with little changes in the watermarked image may be used for content authentication.
Watermarking, Least significant bit algorithm, LSB, PSNR, MSE, SSIM