Discrete wavelet transform based signal stegnography & encryption
Arun Kumar, Anup Mishra · 2012
Stegnography and signal encryption are the most important tools that provide data and information security by hiding the signal under cover signal. It is usually done through mathematical manipulation of the data with on in comprehensible format for unauthorized user. Some time it is essential to transmit Real Time signal through internet with appreciable confidentiality for preventing unauthorized information access, this is prime consideration for growing use of signal stenography. Proposed algorithm based on Discrete Wavelet Transform technique for signal stegnography and one stage of encryption; both methods are used for secure communication Cryptograph which deals with data or signal encryption at sender side and decryption at receiver side (3) with help of key or password, stegnography used for secure data transmission. Key word: Signal encryption, stegnography, DWT, decomposition.