The Study in Role-Based Session with
Spatial Character
Zou ZhiWen , Ju
ShiGuang
(
(EMAIL:ZZW_YJ@126.COM)
The emergence of RBAC model facilitates the system authorization
management. But with the development of modern communications technology, in
particular the optical access technology, the third generation mobile
communication technology, users with mobile terminals can get network information
and services in any location, at the same time this also brings hidden dangers.
In view of this, we used SRBAC as model, and further studied the constraints
under the space environment, the inheritance on space character, constraints
and change laws of session state. For simplicity, we only discuss the session
in the space environment.
First，we give a formal
definition of SRBAC Model , In this model a role at different spatial locations
has different permissions. After extending the traditional session, one PRI is
put to every session, then SRBAC probably lead to the conflictive session, and its
classification methods is given, as well as the strategy of eliminating the
conflictive session is put forward, thus a non-blocked sessions set at any
spatial location is also confirmed. Finally, In SRBAC model, the session may
not satisfy the space constraints, but with the user’s space location change,
the session is likely to satisfy the definition rules
of the space constraints. Therefore, whenever the user changes its location,
the system should judge session state legitimacy.So,we present algorithms which solve the state change
problem of the sessions by the change of spatial location to guarantee the
system’s security.