Elastic Trust Model for Dynamically Evolving Trust Frameworks

Hiroyuki SATO  Noriyasu YAMAMOTO  

IEICE TRANSACTIONS on Information and Systems   Vol.E102-D   No.9   pp.1617-1624
Publication Date: 2019/09/01
Online ISSN: 1745-1361
DOI: 10.1587/transinf.2018OFI0001
Type of Manuscript: INVITED PAPER (Special Section on Log Data Usage Technology and Office Information Systems)
internet trust,  policy decision point (PDP),  assertion exchange,  

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Today, trust plays a central role in services in distributed environments. Conventionally deployed trust has been based on static framework in which a server responds to a service request under statically determined policies. However, in accordance with evolution of distributed environments empowered with IoT and federated access mechanisms, dynamic behavior must be analyzed and taken into service provision, which conventional trust cannot properly handle. In this paper, we propose an extension of PDP (Policy Decision Point) in which assertions together with service requests are evaluated. Furthermore, the evaluation may be dynamically configured in dynamically evolving trust environment. We propose an elastic trust model in view of dynamic trust environment. This enables intuitionistic modeling of typical concrete elastic distributed services.