International Research Journal of Engineering and Technology (IRJET) Volume: 04 Issue: 04 | Apr -2017
e-ISSN: 2395 -0056
www.irjet.net
p-ISSN: 2395-0072
Steganography using PVD Algorithm for Android Application D.Anandhavalli1, C.Priyanka2, N.Shanmuga Sundari3, R.Kumaravalli4, Assistant Professor, Department of Information technology, Velammal College of Engineering and Technology, Madurai, Tamil Nadu, India. 2&4 Student, B.Tech. Information technology, Velammal College of Engineering and Technology, Madurai, Tamil Nadu, India 1&3
-----------------------------------------------------------------------------------------------------------------------------------------Abstract –Information or any message hiding process functions used to identify individual elements of encrypting into digital media for the purpose of security. cover that could be modified during embedding. Steganography is one such technique in which presence of Assume that the first three factors mentioned secret message cannot be detected and we can use it as a tool above are the same, designing the distortion for security purpose to transmit the confidential information function will be an important approach to in a secure way. The goal is to hide the message in such a way minimizing the impact caused by embedding, and that no one apart from intended recipient even knows that the message has been sent. By combining steganography and thus improve the security performance of encryption properties, it becomes harder for even the stegosteganography. analyst to regain the original text from the image. The pixel To minimize the impact caused by data selection filter is used to obtain the best areas to hide embedding, the sender should choose to modify information in the cover image to obtain a better rate. After those elements (pixels/coefficients) in such a way that Message is hidden using Bit Replacement method. We also propose Pixel Value Differencing for implementing that the caused detectable distortion is as small as steganography. In spatial or frequency domain several possible. Embedding the secret message bits Steganographic algorithms have been proposed for under the guidance of minimizing distortion embedding data in digital images as cover media. Our function can improve the security performance of proposed steganography with PVD provides better security steganography and has been known for a long through text. time. In presented the perturbed quantization Key Words: Steganography, pvd, pixel selection filter, stego(PQ) steganography. As a specific case, they analyst pointed out that the sender can constrain the embedding changes to those DCT coefficients that 1. INTRODUCTION experience the largest quantization error. Such kind of coefficients, when rounded to the other Now a day, many android applications are value, may leave the smallest embedding available which provides many smart things to the distortion. users. Google’s Android Operating System in In another two adaptive versions of PQ, i.e., Mobile phones are still relatively new, however, texture-adaptive PQ (PQt) and energy-adaptive PQ Android Operating System has been progressing (PQe) have been presented. Through considering quite rapidly. Steganography is the art and science the local block content such as texture complexity of communicating in a way which hides the and energy capacity, JPEG steganography with existence of the communication. Steganography is higher security performance can be obtained. In, very useful for information security. It may be the authors have combined quantization step with influenced by many factors, such as the choice of quantization error in their distortion function to cover object, the type of modification operation on improve the security performance of JPEG cover elements, the number of embedding changes steganography. (related to the payload), and the distortion © 2017, IRJET
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