Abstract: “Data Communication is the exchange of data between the two devices via some form of transmission medium such as a wire cable. However in 21st century, Data communication can be done by using various networks such as, LAN, MAN, WAN etc. The Information may be in any form i.e. text, audio, vedio or in image form. To transmit the data in different format for long distance, it is going to use modulation Technique and its security can be provide by using various techniques such as Steganography,Encryption and Decryption, Digital Watermarking etc. In this paper, it is going to discuss with “combination of Modulation and Digital Watermarking Technique used for Secure Transmission of Bank Cheques Images.”

Keywords: transforms, modulation techniques, watermark, digital watermarking techniques.