Preventing SQL injection attacks using negative tainting approach

One of the major issues of web application security is SQL injection attacks, which gives attackers an unrestricted access to the database. Preventing SQL Injection attacks using negative tainting approach is an idea of incorporating the uniqueness of negative tainting with linked list structure. As most of the tools available today concentrates on positive tainting technique, less work has been done on negative tainting. So this approach has been chosen and it provides good response time for application programs where large databases are used. This system is able to stop most of the known successful attacks except stored procedures and character encoding attacks and generates very less (negligible) false positives.