Estimation of optimum coding redundancy and frequency domain analysis of attacks for YASS - a randomized block based hiding sche

Our recently introduced JPEG steganographic method called Yet Another Steganographic Scheme (YASS) can resist blind steganalysis by embedding data in the discrete cosine transform (DCT) domain in randomly chosen image blocks. To maximize the embedding rate for a given image and a specified attack channel, the redundancy factor used by the repeataccumulate (RA) code based error correction framework in YASS is optimally chosen by the encoder. An efficient method is suggested for the decoder to accurately compute this redundancy factor. We also show experimentally which DCT coefficients are better suited for hiding and detection under various attacks. The effectiveness of YASS for robust steganography is demonstrated for certain attacks.

• Type: Conference
• Year: 2008
• Where: ICIP
• Authors: Anindya Sarkar, Lakshmanan Nataraj, B. S. Manjunath, Upamanyu Madhow
• Keywords: Discrete Cosine Transform, Error Correction Framework, ICIP 2008, Image Processing, JPEG Steganographic Method, Redundancy Factor, Steganographic Scheme