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Data Hiding in Image using multilevel 2-D DWT and ASCII Conversion and Cyclic Mathematical Function based Cryptography
| International Journal of Computer Applications |
| Foundation of Computer Science (FCS), NY, USA |
| Volume 105 - Number 7 |
| Year of Publication: 2014 |
| Authors: Abbas F. Tukiwala, Sheshang D. Degadwala |
10.5120/18389-9637
|
Abbas F. Tukiwala, Sheshang D. Degadwala . Data Hiding in Image using multilevel 2-D DWT and ASCII Conversion and Cyclic Mathematical Function based Cryptography. International Journal of Computer Applications. 105, 7 ( November 2014), 19-25. DOI=10.5120/18389-9637
Abstract
The preserving secrecy of sensitive data becomes very important in today digital communication. Steganography is the discipline of exchanging top secret information by embedding it into a multimedia carrier and Cryptography is the art of protecting information by transforming it into an undetectable form. The ultimate aim, here is to hide the very existence of the embedded information within seemingly innocuous carriers and transmit in such a way that the existence of information is undetectable. In this paper, proposed method extracts by combining the features of cryptography and steganography. Cryptography using Modified ASCII Conversion & Mathematical Function involves converting the secret message into unprintable form of same size as original message in any cases. Steganography is then applied using multilevel 2-D DWT to embed this encrypted data into a cover media using High Frequency Coefficients of each Dimension at all levels of 2-D Haar DWT and hides its existence. Finally, Performance can be measured by using statistical parameters peak signal noise ratio (PSNR) and Mean Square error (MSE). This proposed method provides all three aspects of data hiding such as capacity, security and robustness.
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