Saddaf Rubab

Work place: Department of Computer Engineering, College of Electrical & Mechanical Engineering, National University of Sciences & Technology (NUST), Islamabad, Pakistan



Research Interests: Computer systems and computational processes, Computer Architecture and Organization, Data Structures and Algorithms


Saddaf Rubab has received her Masters’ degree in Computer Software Engineering from College of Electrical & Mechanical Engineering, National University of Sciences & Technology. From 2011 to 2012 she worked as research assistant and from 2013 she works as lecturer at National University of Sciences & Technology. Her research interests include information hiding, cloud and grid computing.

Author Articles
Efficient Image Steganogrphic Algorithms Utilizing Transforms: Wavelet and Contourlet with Blowfish Encryption

By Saddaf Rubab Younus Javed

DOI: ijcnis.2015.02.02, Pub. Date: 8 Jan. 2015

Steganography is a means to hide the existence of information exchange. Using this technique the sender embeds the secret information in some other media. This is done by replacing useless data in ordinary computer files with some other secret information. The secret information could be simple text, encoded text or images. The media used as the embedding plane could be an image, audio, video or text files. Using steganography ensures that no one apart from the sender and the receiver knows about the existence of the message. In this paper, a steganography method based on transforms used i.e. Wavelet and Contourlet. Devised algorithm was used against each transform. Blowfish Encryption method is also embedded to double the security impact. The major advantage of applying transforms is that the image quality is not degraded even if the number of embedded characters is increased. The proposed system operates well in most of the test cases. The average payload capacity is also considerably high.

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