Abstract: Digital Watermarking is the process in which message can be sent to a desired personnel or organization without being hacked or distorted. Malware attacks are zero in digitally watermarked signals. This watermarking can be applied to still images, audio signals and video files. The main idea behind the digital watermarking is to provide data security; the host image is used as a carrier signal which carries the embedded signal that is known as watermarked image. An owner identification key is used which recognizes the sender and the recipient to which the message has to be sent is known as key, without it the message cannot be decrypted. Steganography and cryptography are the two other processes which provide data security. Steganography is the origin of digital watermarking that is securing data by embedding it into other media and then sending it to the desired destination to confirm secure transmission.
Keywords: Digital Watermarking, LSB, DCT, robustness.