Semantic Analyzer for Audio Steganography

Abstract: In the current internet community, secure data transfer is limited due to its attack made on data communication. So more robust methods are chosen so that they ensure imperceptible and secured data transfer. Audio steganography is the one in which data is hidden inside the audio files in the form of bits spread over the unused bits inside the audio file. This research work shows the implementation of a novel steganography technique for hiding digital data into wav audio files using spread spectrum technique and a semantic analyzer coupled with a lexicon of words. However to maintain more security for data, the steganography is implemented with the help of encryption technique, but in this methodology, the implementation of dictionary system is done where words are stored in the database and each word is assigned with a unique number. These unique numbers of words are used for encoding the words of a secret message that is going to be hidden inside the audio file. The words of a message can be segregated into noun, pronoun, verbs, determiner, adjective, adverb etc for their semantic analysis. Furthermore, the implemented technique used two intermediates to transmit the secret data between communicating parties. In the first intermediate English language message is encoded on the basis of unique numbers and also do semantic analysis of words in the message, after that encoded message is hidden inside the audio file. In the second intermediate the hidden encoded message is recovered from the audio file and decodes the message to get the original information.

Keywords: Audio Steganography, lexicon of words, Security, Spread Spectrum, Semantic Analyzer.