000000121 001__ 121
000000121 005__ 20130522141951.0
000000121 037__ $$aLERSSE-PRESENTATION-2006-059
000000121 041__ $$aeng
000000121 100__ $$aKonstantin Beznosov
000000121 245__ $$aThe Secondary and Approximate Authorization Model and its Application to BellLaPadula Policies
000000121 260__ $$c2006-10-18
000000121 520__ $$aThe request-response paradigm used for access control solutions commonly leads to point-to-point (PTP) architectures, with security enforcement logic obtaining decisions from authorization servers through remote procedure calls. In massive-scale and complex enterprises, PTP authorization architectures result in fragile and inefficient solutions. They also fail to exploit virtually free CPU resources and network bandwidth. This talk introduces a three-fold approach to improving availability and performance of authorization solutions: employing publish-subscribe technologies, *actively* recycling authorizations, and flooding PEPs with speculatively precomputed *junk* authorizations.  After introducing the approach, the talk describes in detail the active authorization recycling part. Specifically, it defines the secondary and approximate authorization model (SAAM). In SAAM, approximate authorization responses are inferred from cached primary responses, and therefore provide an alternative source of access control decisions in the event that the authorization server is unavailable or slow. The ability to compute approximate authorizations improves the reliability and performance of access control sub-systems and ultimately the application systems themselves. The operation of a system that employs SAAM depends on the type of access control policy it implements. We propose and analyze algorithms for computing secondary authorizations in the case of policies based on the Bell-LaPadula model. In this context, we define a dominance graph, and describe its construction and usage for generating secondary responses to authorization requests. Preliminary results of evaluating SAAM-BLP algorithms demonstrate a 15% increase in the number of authorization requests that can be served without consulting access control policies.
000000121 6531_ $$aSAAM
000000121 6531_ $$aJAMES
000000121 6531_ $$aaccess control
000000121 6531_ $$aBell-LaPadulla
000000121 6531_ $$aBLP
000000121 6531_ $$aaccess control models and languages
000000121 8560_ $$fqiangw@ece.ubc.ca
000000121 8564_ $$uhttp://lersse-dl.ece.ubc.ca/record/121/files/121.pdf$$yTransfer from CDS 0.99.7
000000121 909C4 $$pKonstantin Beznosov	 "The Secondary and Approximate Authorization Model and its Application to BellLaPadula Policies," Marina del Rey, Clifornia, USA, Computer Networks Division, Information Sciences Institute, the University of Southern California, 6 February, 2006, pp.35.
000000121 980__ $$aPRESENTATION