This report delves into the crucial security measures implemented during the implementation phase of the Software Development Life Cycle (SDLC). It highlights several key considerations, starting with the acceptance and inspection phase, which validates the deliverables against specifications. The report then discusses the integration of security controls, ensuring their incorporation into the operational site, and the importance of security certification for verifying control effectiveness and identifying vulnerabilities. Furthermore, it covers security accreditation, which authorizes system use based on assurance levels, and emphasizes the need to erase development and test environments properly. The report also emphasizes the importance of periodic evaluation and testing to assess system effectiveness and the integration of security certificates to mitigate fraudulent transactions. The report concludes by underscoring the necessity of these security measures in mitigating risks and preventing extra costs associated with the implementation phase.