The official PGP user's guide
Challenges and architectural approaches for authenticating mobile users
Proceedings of the 1st international workshop on Software architectures and mobility
QACBAC: an owner-centric QoC-aware context-based access control model for pervasive environments
SPRINGL '08 Proceedings of the SIGSPATIAL ACM GIS 2008 International Workshop on Security and Privacy in GIS and LBS
A new monitor model for enhancing trust-based systems
ATC'10 Proceedings of the 7th international conference on Autonomic and trusted computing
Fuzzy Role-Based Access Control
Information Processing Letters
Context awareness in network selection for dynamic environments
PWC'06 Proceedings of the 11th IFIP TC6 international conference on Personal Wireless Communications
HealthSec'12 Proceedings of the 3rd USENIX conference on Health Security and Privacy
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Alice first meets Bob in an entertainment shop, then, they wish to share multimedia content, but Do they know what are trustworthy users? How do they share such information in a secure way? How do they establish the permissions? Pervasive computing environments originate this kind of scenario, users with their personal devices interacting without need of wires, by forming ad-hoc networks. Such devices considered pervasive are having increasingly faster processors, larger memories and wider communication capabilities, which allows certain autonomy for collaborating and sharing resources. So, they require a suitable access control in order to avoid unauthorised access, or disclosure/modification of relevant information; in general, to protect the data that are usually confidential and the resources. This paper presents a distributed solution for access control, making use of the autonomy and cooperation capability of the devices, since in open dynamic environments is very difficult to depend on central server. The access control is based on a pervasive trust management model from which trust degrees are dynamically obtained. We present the TrustAC reference and functional model, as well as a prototype implementation using XACML-compliant policies.