Efforts to defend against automated attacks on e-commerce services have led to a new security protocol known as a CAPTCHA, a challenge designed to exploit gaps in the perceptual a...
In the paper, we address oracle attacks for integrity watermarking in a communication setting. We show how an integrity verification algorithm can be modified in order to counte...
The Grid community is actively working on defining, deploying and standardizing protocols, mechanisms, and infrastructure to support decentralized, seamless, and secure interacti...
Security in collaborative peer groups is an active research topic. Most previous work focused on key management without addressing an important pre-requisite: admission control, i...
Most people consider frequent software updates a nuisance. However, we show how this common phenomenon can be turned into a feature that protects against software piracy. We defin...