Landwehr, C. and B. Thuraisingham (eds.).  Database Security VI:
 Status and Prospects, ISBN 0 444 89889 1, North-Holland, New York, 
 1993, 397 pages.

<blockquote>
This volume contains the papers presented at the Sixth IFIP WG11.3
Working Conference on Database Security, as revised by the authors
following presentation, together with an account of the discussions
held during the meeting and the IFIP WG11.3 Research Questions List.
Papers presented covered a wide range of topics in database security
including the semantics of multilevel database applications, security
policies and models, the inference problem, and multilevel database
concurrency control.
</blockquote>