ABSTRACT
The Information Systems, Databases are vital and critical in the arena of Business, Enterprise, Governance
etc., for the decision making. Further, the Information Systems are designed to reach maximum number of people
for interaction with system. This intent of system usage appears to be resourceful but the identification of reliable
users of system has challenged the technocrats
Most of the applications uses relational data base system (RDBMS) for the database support but with
intelligent exploitation of vulnerability in Structured Query Language (SQL) of RDBMS, the dishonest people are
interested in manipulation or processing of the data for business value reduction or damage
This paper attempts to endow with security to a relational database system by the inclusion of newly designed
semiotic to keyword SECURE into a lexicon of SQL. Then the semiotic is articulated in relational algebraic
expression for current query engine execution.
Keywords: - Query, Security, Relation, Set Difference, Semiotic