To understand the significance of security metrics, we reviewed the available product and process metrics for various stages of SDP. Further, we have proposed security metrics and effectiveness factor for software development stages that may help in controlling the security flaws. The process metrics based on different software development stages and the product metrics are illustrated, We propose proactive security metrics required during the software development process that focuses on the security issues of its various stages. The effectiveness factor of security metrics on various development stages are presented. Three case studies illustrating the security metrics and effectiveness factors are presented.

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