Development of information hiding system based on AVI format

العناوين الأخرى

تطوير نظام إخفاء المعلومات مبني على صيغة ملف صوتي صوري متداخل

مقدم أطروحة جامعية

Ghazul, Suzan Sabah

مشرف أطروحة جامعية

al-Husayni, Imad Husayn

أعضاء اللجنة

Namik, Sarcote
al-Jumah, Basim Abd al-Baqi
Said, Waladin Khayri
al-Khafaji, Husayn K.

الجامعة

الجامعة التكنولوجية

الكلية

-

القسم الأكاديمي

قسم هندسة الحاسوب

دولة الجامعة

العراق

الدرجة العلمية

ماجستير

تاريخ الدرجة العلمية

2007

الملخص الإنجليزي

Digital communication has become an essential part of infrastructure nowadays, a lot of applications are Internet-based and in some cases it is desired that communication be made secret.

Consequently, the security of information has become a fundamental issue, many of the techniques are available to achieve this goal some of them are the Encryption and the steganography techniques.

Using cryptography, the information is transformed into some other gibberish form and then the encrypted information is transmitted.

Steganography is a process that involves hiding a message in an appropriate carrier, the carrier can then be sent to a receiver without anyone else knowing that it contains a hidden message. The aim of this project is to develop an AVI (Audio Video Interleave) Hiding Information System (HIS) based on steganography techniques to prevent intruders to obtain the transmitted information.

This work is based on a combination of steganography and cryptography techniques to increase the level of security and to make the system more complex to be defeated by attackers. In this work AVI file is separated into two parts, video and audio. The video is a stream of frames; each frame is stored as a BMP file image and a number of frames required or needed to be used as a cover is chosen. The audio part of the AVI file is separated as WAV (Window for Audio Visual) file format. The algorithm that is used for encryption is the Blowfish.

Blowfish can be used as a replacement for the DES (Data Encryption Standard) or IDEA (International Data Encryption Standard) algorithms.

It is a symmetric (that is, a secret or private key) 64-bit block cipher that uses a variable-length key, from 32 bits to 448 bits, a variable-length key would make cryptoanalysis more difficult for potential attackers.

Two methods of hiding are used in this work, the first method is the Least Significant Bit (LSB) and the second is the Haar Wavelet Transform (HWT). The proposed HIS system was tested using standard objective measures such as Mean Square Error (MSE) and Peak Signal to Noise Ratio (PSNR).

All of the measures obtained as the test results indicate good results for PSNR and they increase when the number of frames used as a cover increases.

The resultant stego-file is then transmitted without drawing any suspicion, so the main goal of steganography is performed. The reconstructed data is the same as secret data.

التخصصات الرئيسية

تكنولوجيا المعلومات وعلم الحاسوب

عدد الصفحات

94

قائمة المحتويات

• APA
• MLA
• AMA

لغة النص

الإنجليزية

نوع البيانات

رسائل جامعية

رقم السجل

BIM-749821