In this paper, we describe new methodology for developing steganalytic methods for JPEG images. The proposed framework can be applied to virtually all current methods for JPEGs including OutGuess, F5, and J-Steg. It also enables accurate estimation of the length of the embedded secret message. The methodology is demonstrated on OutGuess 0.2.

A uto-immune diseases are a major health problem in both developed and developing countries: They cause as many deaths as the leading infectious diseases and exact an even greater toll on patients’ quality of life given their chronic nature (Box 1). Reliable data for all auto-immune diseases are hard to collect, but a 2011 study by the American Autoimmune Related Diseases Association (AARDA) re...

Many multiple alignment methods implicitly or explicitly try to minimize the amount of biological change implied by an alignment. At the level of sequences, biological change is measured along a phylogenetic tree, a structure frequently being predicted only after the multiple alignment instead of together with it. The Generalized Tree Alignment problem addresses both questions simultaneously. I...

T he parliamentary elections in Afghanistan were the final event of the internationally-sponsored Bonn Accords of December 2001. During the past four years, Afghanistan has made significant progress toward democracy while reconstructing the country’s political, social, and security institutions. These include adopting an enlightened constitution (January 2004), holding a successful presidential...

Afghanistan is in danger of capsizing in a perfect storm of insurgency that mimics operations and tactics witnessed in Iraq. This article assesses this insurgency and the re-emergent Taliban. The common view of the Taliban as simply a radical Afghan Islamist movement is overly simple, for that organization has been able to build on tribal kinship networks and a charismatic mullah phenomenon to ...