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• W2619377 abstract "Traditionally, security for stand-alone computers and small networks was handled by physical security and by logging into computers and domains. With open networks like the Internet and pervasive environments, issues concerning security and trust become crucial. There is no longer the physical aspect of security due to the distributed nature of the networks and the concept of user authentication to a domain is not possible. Imagine a scenario where a user, with a portable device, walking through a building, switches on the lights in the corridor and lowers the temperature of the room that he/she enters. This is an example of pervasive/ubiquitous environments that will soon be a reality. In these ubiquitous computing environments users expect to access resources and services anytime and anywhere, leading to serious security risks and problems with access control as these resources can now be accessed by almost anyone with a mobile device. Adding security to such open models is extremely difficult with problems at many levels. We can not assume an architecture with a central authority and access control is required for foreign users. The portable hand-held and embedded devices involved have severe limitations in their processing capabilities, memory capacities, software support and bandwidth characteristics. Moreover, there is currently a great deal of heterogeneity in the hardware and software environments and this is likely to continue for the foreseeable future. Finally, in such an open, heterogeneous, distributed environment there is a great likelihood that inconsistent interpretations will be made of the security information in different domains. Existing security infrastructures deal with authentication and access control. These mechanisms are inadequate for the increased flexibility required by distributed networks. We suggest enhancing security by the addition of trust, which is similar to the way security is handled in human societies. A person is trusted if someone we trust, says that the person can be trusted. In terms of distributed computing, a user is allowed to access a service or information, if the user has the access right to do so, or if the user has been delegated the ability by a trusted authority. Trust management can be viewed as developing of security policies, the assignment of credentials to entities, checking if the credentials fulfill the policy and the delegation of trust to third parties [8, 3]. We propose a lightweight solution for trust management that is applicable for the Internet, which we are tailoring for pervasive computing environments." @default.
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• W2619377 date "2001-01-01" @default.
• W2619377 modified "2023-09-27" @default.
• W2619377 title "Moving from Security to Distributed Trust in Ubiquitous Computing Environments" @default.
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