Extended Power Modulus Scrambling (PMS) Based Image Steganography with Bit Mapping Insertion

With the technological advancement, security of information has become a sensitive and alarming issue since it is highly susceptible to many dangerous threats and attacks. In this context, we propose a steganographic methodology which endows a number of conditional evaluations in order to facilitate encryption and masking of the data. The Extended Power Modulus Scrambling (PMS) technique provides an encryption mask to the cover. It ensures the generation of randomized swapping sequence based on the estimated conditions, thus intensifying the security level. A new Bit Mapping Insertion strategy is implemented next. This method implants the data bits within the encrypted cover medium (in this case, image). Furthermore, the reverse scrambling technique zips and covers up the private data. This procedure accredits high payload in conjunction with retaining the quality of the image. The evaluation is done against various benchmarking parameters, which establishes the imperceptibility theory corresponding to the generated output images.