
Distributed Database Security and Catalog Management
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12.3.2 Distributed Authorization Control
Authorization control in distributed DBMSs involves remote user authentication, management of
distributed authorization rules, view management and control of user groups. Management of
views in distributed database systems was already discussed in Section 12.2.2. In a distributed
database system, users may identify themselves from any sites; therefore, remote user authentica-
tion is necessary to prevent unauthorized accessing.
There are two different ways for implementing remote user authentication as described in
the following:
In the fi rst approach, ...