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PERCOM
2005
ACM

Secure context-sensitive authorization

14 years 3 months ago
Secure context-sensitive authorization
There is a recent trend toward rule-based authorization systems to achieve flexible security policies. Also, new sensing technologies in pervasive computing make it possible to define context-sensitive rules, such as "allow database access only to staff who are currently located in the main office." However, these rules, or the facts that are needed to verify authority, often involve sensitive context information. This paper presents a secure context-sensitive authorization system that protects confidential information in facts or rules. Furthermore, our system allows multiple hosts in a distributed environment to perform the evaluation of an authorization query in a collaborative way; we do not need a universally trusted central host that maintains all the context information. The core of our approach is to decompose a proof for making an authorization decision into a set of sub-proofs produced on multiple different hosts, while preserving the integrity and confidentiality ...
Kazuhiro Minami, David Kotz
Added 24 Dec 2009
Updated 24 Dec 2009
Type Conference
Year 2005
Where PERCOM
Authors Kazuhiro Minami, David Kotz
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