Combining IID with BDD to Enhance the Critical Quality of Security Functional Requirements

In software system, functional requirements are primary system requirements. Client cannot explicitly depicted security requirements and the development team is hard to understand security requirements, makes security requirements difficult to specific implant software system. In software system development process, security requirements often neglected and ignored. However, the cost of correcting security flaws in maintenance phase is over 100 times in requirements phase. Can´t effectively improve the system security, enterprises loss is bound to continue to expand. In order to enhance the security of software system, this paper combines the popular software development methodology IID (Interactive and Incremental Development) with BDD (Behavior Driven Development), institutionalized requires functional requirements must be integrated into security requirements. And, using BDD process features to evaluate the major quality of security functional requirements. Timely identifies and modifies the quality defects of security functional requirements item, effectively enhance the security of software systems.