688 search results - page 46 / 138 » A Calculus for Access Control in Distributed Systems |
COORDINATION
2006
Springer
14 years 27 days ago
2006
Springer
Van der Aalst recently proposed a set of workflow patterns to characterize the kinds of control flow that appear frequently in workflow processes. These patterns are useful for eva...
SDMW
2005
Springer
14 years 2 months ago
2005
Springer
In this paper we present our authorization framework that supports the dynamic set-up of Web service federations for sharing data within virtual federations. Building on previous w...
SP
2007
IEEE
14 years 3 months ago
2007
IEEE
In several distributed systems a user should only be able to access data if a user posses a certain set of credentials or attributes. Currently, the only method for enforcing such...
CDC
2008
IEEE
14 years 3 months ago
2008
IEEE
—We study the problem of dynamic spectrum sensing and access in cognitive radio systems as a partially observed Markov decision process (POMDP). A group of cognitive users cooper...
WOWMOM
2009
ACM
14 years 3 months ago
2009
ACM
Abstract— Spectrum-agile radios, also known as cognitive radios, have a great potential to improve spectrum utilization by enabling dynamic access to the spectrum. A key challeng...