DATA HIDING IN IMAGE USING CRYPTOGRAPHY AND STEGANOGRAPHY: AN INVESTIGATION

Abstract

The aegis of data over unsecure transmission network has continually a key concern in the consideration of cyber professionals. With the expeditious promising practice of the cyber world in all personnel and professional drives, the distress for the unauthorized ingression and later exploitation by an intruder, has further put pressure on the industry or researchers for developed new methods and techniques to bulwark the information from intruders involves in cybercrime.
Cryptography is the art dealt with the converting a confidential information into inaudible forms. This unintelligible information might engender distrustful in the mind of opponents when it transfers on insecure communication media and only valid recipient can only by decoding it. Conversely, Steganography embed confidential information in to a cover image and hides its subsistence. As a mundane hiding of secrete data is apply in communication on text, image or multimedia contents digital signature and authentication.
Mutually Cryptographic and Steganographic methods distributes the satisfactory security but are vulnerable to attackers when information flow over insecure communication media. Efforts to amalgamate these techniques i.e. Steganography and Cryptography, gives the ultimate results in security improvement. The steganographic techniques currently used mainly accentuation on embedding mechanism with less consideration to pre-processing of confidential information. The advantage of pre-processing offer robustness, high security level and flexibility in the safety system