Session I: Steganography and Steganalysis -- A New Approach to Estimating Hidden Message Length in Stochastic Modulation Steganography -- Information Transmission and Steganography -- On the Existence of Perfect Stegosystems -- Towards Multi-class Blind Steganalyzer for JPEG Images -- Session II: Fingerprinting -- An Efficient Fingerprinting Scheme with Symmetric and Commutative Encryption -- C…