Developed method of information hiding in video AVI file based on hybrid encryption and steganography

الملخص EN

This paper produces a development of an AVI 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 are chosen.

The algorithm that is used for encryption is the Type-3 Feistel Network of The 128-bits block size improved Blowfish encryption it is a symmetric uses a variable-length up to 129 bytes, making it useful for both domestic and exportable use and 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 subjective 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 (above 50db) and they increase when the number of frames used as a cover increases.