Static detection of security flaws in object-oriented databases
SIGMOD '96 Proceedings of the 1996 ACM SIGMOD international conference on Management of data
Distributed and parallel database systems
ACM Computing Surveys (CSUR)
A nested transaction model for multilevel secure database management systems
ACM Transactions on Information and System Security (TISSEC)
Database Security-Concepts, Approaches, and Challenges
IEEE Transactions on Dependable and Secure Computing
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The concurrency control in distributed database management systems is an important research problem. Several concurrency control algorithms have been proposed for secure distributed real time database systems, and several have been and are being implemented. Most of the concurrency control algorithms are the variations of the following basic techniques: Two-Phase Locking, Timestamp Ordering and Serialization Graph Testing. These algorithms may not be providing accurate performance model. In this paper, it is proposed an algorithm model to enhance the performance of concurrent transactions for multilevel security for distributed database. This model reduces the data access time and wait time for every transaction monitored by the sub-query analyzer. Simulation study reveals that the effective enhancement of performance for concurrent transactions with different levels of security.