Text Hiding in Multimedia by Huffman Encoding Algorithm using Steganography

Abstract

Information hiding is a part of information Security. Steganography is a technique of information hiding that focuses on hiding the existence of secret messages. Image steganography is a process that hides the message into cover-image and generates a stego-image. That stego-image then sent to the receiver without anyone else knowing that it contain the hidden message. The receiver can extract the message with or without stego-key that depends on the hidden scheme Audio steganography is one of the popular data hiding techniques that embeds secret data in audio signals. The secret data is hidden in a way that unauthorized persons are not aware of the existence of the embedded data and without altering the quality of the cover audio. Data hiding in audio signals has numerous applications such as protection of copyrighted audio signals, covert communication, hiding data that may influence the security and safety of governments and personnel Least significant bit (LSB) coding is the simplest way to embed information in a digital audio file. By substituting the least significant bit of each sampling point with a binary message, LSB coding allows for a large amount of data to be encoded. Embedding secret messages into digital sound is known as audio Steganography. Audio Steganography methods can embed messages in WAV, AU, and even MP3 sound files. For hiding secret information in Videos, there exists a large variety of steganography techniques some are more complex than others and all of them have respective strong and weak points. Digital video sometimes needs to be stored and processed in an encrypted format to maintain security and privacy. For the purpose of content notation and/or tampering detection, it is necessary to perform data hiding in these encrypted videos.

               After that, PSNR and SNR ratio are calculated. As well as In Image Steganography, JPEG Image and BMP or PNG image comprise. In Audio Steganography, WAV File and AU sound file comprise. In Video avi file is use.