tailieunhanh - Efficient and secure biometric image stegnography using discrete wavelet transform

Instead of embedding secret data anywhere in image, it will be embedded in only skin tone region. This skin region provides excellent secure location for data hiding. So, firstly skin detection is performed in cover images and then Secret data embedding will be performed in DWT domain as DWT gives better performance than DCT while compression. This biometric method of Steganography enhances robustness than existing methods. | ISSN:2249-5789 Sunita Barve et al, International Journal of Computer Science & Communication Networks,Vol 1(1),September-October 2011 Efficient and Secure Biometric Image Stegnography using Discrete Wavelet Transform Sunita Barve, Uma Nagaraj and Rohit Gulabani Department of Computer Engineering Maharashtra Academy of Engineering, Alandi Abstract Steganography is the science of concealing the existence of data in another downgrading and contamination which is now known as Steganography. Cyber- transmission medium. It does not replace cryptography but rather boosts the terrorism, as coined recently, is believed to benefit from this digital revolution. security using its obscurity features. As proposed method is Biometric Steganography, here the Biometric feature used to implement Steganography is Skin tone region of images. Proposed method introduces a new method of embedding secret data within the skin portion of the image of a person, as it is not that much sensitive to HVS (Human Visual System). Instead of embedding secret data anywhere in image, it will be embedded in only skin tone region. This skin region provides excellent secure location for data hiding. So, firstly skin detection is performed in cover images and then Secret data embedding will be performed in DWT domain as DWT gives better performance than DCT while compression. This biometric method of Steganography enhances robustness than existing methods. I. INTRODUCTION Steganography is defined as science or art of hiding (embedding) data in transmission medium. Steganography is a type of hidden communication that literally means “covered writing” (from the Greek words stegano or “covered” and graphos or “to write”). The first use of the term steganography was recorded in 1499 by Johannes Trithemius in his “Steganographia”, a dissertation on cryptography and steganography disguised as a book on magic. The goal of Figure 1: The prisoner’s problem steganography is to hide an information message