Cover Story Management
This work addresses database security and integrity issues for users of multilevel systems, but it appears incremental as it builds on existing polyinstantiation techniques.
The paper tackles the problem of managing cover stories in multilevel databases by defining a new technique and proposing a formal representation that is generic across database types, and it addresses the update problem for such databases.
In a multilevel database, cover stories are usually managed using the ambiguous technique of polyinstantiation. In this paper, we define a new technique to manage cover stories and propose a formal representation of a multilevel database containing cover stories. Our model aims to be a generic model, that is, it can be interpreted for any kind of database (e.g. relational, object- oriented etc). We then consider the problem of updating a multilevel database containing cover stories managed with our technique.