We introduce captcha, an automated test that humans can pass, but current computer programs can’t pass: any program that has high success over a captcha can be used to solve an u...
Luis von Ahn, Manuel Blum, Nicholas J. Hopper, Joh...
Abstract. Task-structured probabilistic input/output automata (taskPIOAs) are concurrent probabilistic automata that, among other things, have been used to provide a formal framewo...
Aaron D. Jaggard, Catherine Meadows, Michael Mislo...
A major advantage of service-based computing technology is the ability to enable rapid formation of large-scale distributed systems by composing massively available services to ac...
Stephen S. Yau, Yisheng Yao, Zhaoji Chen, Luping Z...
This paper presents an embedded security sublanguage for enforcing informationflow policies in the standard Haskell programming language. The sublanguage provides useful informat...
Purpose – This paper aims to address some security issues in open systems such as service-oriented applications and grid computing. It proposes a security framework for these sy...