This guide outlines the process of developing a secure online exam, emphasizing the importance of integrating security measures throughout the exam creation process. It discusses the challenges of exam development, including the risks of exam theft and the need for psychometrically sound assessments. The document details various strategies for enhancing security, such as reducing item exposure, utilizing advanced item types, and creating longer-lasting item pools. It also highlights the benefits of secure test designs, including improved measurement accuracy and restored validity of test scores. The guide provides practical considerations for exam developers, including team composition, project deadlines, budget allocation, and the types of security features needed. Additionally, it debunks common myths about exam development and emphasizes the necessity of ongoing maintenance and monitoring post-launch to ensure the integrity of the exam. Overall, the guide serves as a comprehensive resource for creating secure online assessments.