A Comparative Study on Cryptography, Steganography and Watermarking Techniques used for Data Security

Cryptography, Steganography and Watermarking are three popular ways of sending information in a secret way. Now a day’s computer applications are developed to handle financial and personal data, the real need for data security. Data security means protecting Data from unauthorized access. It is very challenging task to transmit data from sender to authorized receiver with full security through an insecure media. This paper is an attempt to analyze the data protecting techniques such as steganography, cryptography and watermarking.