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SFB 627: Nexus |
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Project A3:
Security, Privacy and Accounting in Context-aware Systems |
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Prof. Dr.-Ing. Dr. h.c. mult. Paul J. Kühn
University of Stuttgart
Institute of Communication Networks and Computer Engineering
Pfaffenwaldring 47
D 70569 Stuttgart
Tel. +49 (0)711 685-8027
Fax +49 (0)711 685-7983
mail@ikr.uni-stuttgart.de
Overview
Services and applications relying on the use of
comprehensive spatial world models and thus also on the
use of personal data affect sensitive private domains
and raise therefore far-reaching security and
acceptability questions. The involved parties impose
different requirements: From the users' point of view it
is crucial to protect personal data from unauthorized
use. From the point of view of service operators and
information providers it is of most interest to ensure
the feasibility to account for the use of their services
and to protect them against unauthorized access. This
research project will therefore investigate solutions
for open future service platforms which address these
conflictive needs of users, providers and operators. The
two identified main topics, security and privacy on the
one hand as well as the enabling of accounting on the
other hand are intimately connected with respect of
content and methods. These topics have to be researched
in close cooperation in order to develop multilateral
security concepts for context-aware services. The
development of technical solution will also identify
potential regulatory or legal need for action.
Subject of the first main topic is the enhancement of
security and privacy protection mechanisms that have
been developed and implemented initially statically in
the first funding period. The aim is to construct a
security framework that dynamically adapts to the
context of the users and to the changing roles of the
parties involved. On the one hand, the information in
the spatial world model has to be protected, but on the
other hand, it should also be possible to use it as
input for security mechanisms. Thus, fine-grained,
context-aware and trust-dependent access control
mechanism are developed in order to protect the model
data against unauthorized use. The deployment of
distributed reputation systems will ensure that
mechanisms and services will remain accessible even if
not all involved users, service providers and operators
are considered trustworthy or if there is limited
cooperation amongst them.
Subject of the second main topic is the development and
investigation of system architectures and technical
mechanisms that allow for context-aware service
accounting. Therefore, session and signaling mechanisms
for federated system platforms have to be
developed. Based on that, scalable procedures for
differentiated usage- and context-dependent accounting
will be investigated and integrated into the open system
platform developed in the collaborative research
center. The objectives are procedures that allow for
context information usage accounting, but which provide
at the same time an extensive privacy protection for the
users.
Institute
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