A coalesce model for secure database

With the increasing dependency of organizations on Database Systems for their daily transactions, the vulnerability of the system to security breaches has also increased. In spite of the various schemes available to protect the database at various levels, a need for a complete security system has been long felt. Keeping this in mind, we present a study of the security schemes for multilevel access control, concurrency control and web-based security. In this paper, we attempt to secure database against intruders and for this propose a model. The coalesce model proposed provides total security at all levels from both the internal as well as external attacks maintaining the accessibility and availability of the database.