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EUROCRYPT
2003
Springer
15 years 5 months ago
CAPTCHA: Using Hard AI Problems for Security
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...
IFIP
2010
Springer
14 years 7 months ago
Reasoning about Probabilistic Security Using Task-PIOAs
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...
WORDS
2005
IEEE
15 years 6 months ago
An Adaptable Security Framework for Service-based Systems
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...
TCS
2010
14 years 11 months ago
Arrows for secure information flow
This paper presents an embedded security sublanguage for enforcing informationflow policies in the standard Haskell programming language. The sublanguage provides useful informat...
Peng Li, Steve Zdancewic
FAST
2009
14 years 10 months ago
Towards Semantics for Provenance Security
Provenance records the history of data. Careless use of provenance may violate the security policies of data. Moreover, the provenance itself may be sensitive information, necessi...
Stephen Chong