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Article
A Coding-Based Steganography Using Multiple Frequency Domains

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Abstract

Abstract:In this paper, a new technique for hiding text in a bitmap images will be present. The technique based on using an index of the dictionary representing the characters of the secret messages instead of the characters themselves. The technique uses multiple frequency domains for embedding these indexes in an arbitrary chosen bitmap image. By using discrete cosine transform DCT, discrete wavelet transform DWT, and a combination of both of them. ِA software package for implementing this technique are built and we got very good results in terms of capacity of hiding, imperceptibility which are the most two important properties of steganography, the time of hiding the text, and the security issues.

التقنية تعتمد على استخدام قهرس القاموس . Bitmap قي هذا البحث سيتم تقديم تقنية جديدة لاخقاء النص قي صور من نوعلتمثيل الاحرف في الرسائل المشفرة بدلا من الاحرف نفسها. وهذه التقنية تستخدم التعددية في المجال الترددي لتضمين هذه الفهرسة فيالصورة المختارة. باستخدام تحويل الجيب تمام المتقطع و تحويل الدالة المويجية المتقطع وكذلك الدمج بينهما. تم تنفيذ حقيبة نظام برمجيوتم الحصول على نتائج جيدة جدا وخصوصا فيما يتعلق بالمساحة المتوفرة للاخفاء والغموض اللتان تعتبران اهم (YAD Stego) سميتخواص علم الاخفاء وكذلك تم الاخذ بنظر الاعتبار عاملا الوقت والامنية

Keywords

Steganography --- JPEG --- GIF --- BMP --- DCT --- DWT --- YAD --- MSE --- PSNR


Article
Proposed Steganography Method to Hide Image Data in Wav File

Author: Salwa K. Abd Allteef
Journal: Journal of University of Babylon مجلة جامعة بابل ISSN: 19920652 23128135 Year: 2011 Volume: 18 Issue: 1-2 Pages: 360-367
Publisher: Babylon University جامعة بابل

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Abstract

This paper produces a new suggested method for hidden image information in the wav file. The method takes any type of image file format such as (BMP, GIF or TIFF) that contain the image information to be hidden that represented in binary form, then this file hides in the wav file by replacing image information with wav file digits. The replacement is done into separate distance. This method is done with out making noise in sound file. We implement our proposed system using MATLAB ver. 7.

In computer technology, there is much communication system between human like phone, fax, network, radio, and so on, and the spoken device. Each of them must have minimum security for data transfer, to sure only the person in receiver can know the message. To provide this done, either through using systems communication that gives a high level of security or no using Steganography system. The embed process in digital media not easy, it must be proved many condition to success, To get complete hide must be invisible in multi media, for example the hide in voice recorder is very difficult because the human hear is limited and the frequency limited maximum more than thousand to one [Gopalan,2003], so it is difficult to add or remove information from original data. There are a lot of hiding methods using Steganography available in the literature ,first category messages are hidden in the LSB of the 8 bit binary strings [Jupin,2004] so use Steganography within digital images(bmp, png) using LSB substitution [Nabavian,2007], second category hiding information inside audio files used in low bit encoding [Mangarae,2006], hiding data steganographically in four techniques in voice message, low bit coding, phase coding, spread spectrum embedding and echo hiding [Chang,Moskowitz,1997] and hide messages in wave files[Friedheim,2006-2007]. In this paper we introduce a method of Steganography to hide a file of image of any type of format (GIF, BMP,JPEG) but view the size of file in wave(waveform audio file format),and regain image from wave file container

Keywords

BMP --- GIF --- Image file format --- TIFF --- Wav file --- RIFF

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