Text Data Fusion to Speech Signal Using Hash Function Algorithm

Proposed paper work concentrates on the secure transmission of text data when digital contents are commonly distributed by Internet and more security attacks are appeared from eavesdropping, data exposure and data tampering. In this paper we concentrate on hiding some secret text into a real time speech signal considering PSNR (Peak-Signal-to-Noise Ratio) and duration of speech signal as key parameters for hiding data. Text message is intended to appear as unwanted noise in speech signal to the unintended recipients and this process leads to a way direct to covert communication. A function called hash function is applied on text data before embedding it into speech signal which includes text data division into small chunks and interchanging their places in a specified manner to enhance the security level and intended recipients are supposed to extract the secret text with predetermined hash key. In this way this paper purposes a technique which can be called a cousin of steganography where a secret information is transferred by hiding it into another unsuspicious cover media such as image, audio or video signal to conceal actual existence of secret message. Index Terms Data security, Hash function, Speech signal, Steganography