Which of the following is a key element of developing application security?

Finding and preventing vulnerabilities is a cornerstone of developing application security. This process involves identifying potential weaknesses within an application before they can be exploited by attackers. By focusing on vulnerabilities, developers and security teams can implement robust security measures during the development lifecycle. This proactive approach not only protects the application during its operation but also reduces the risk of costly breaches and data loss.

Addressing vulnerabilities entails employing various methods such as threat modeling, conducting code reviews, and utilizing security testing tools to spot issues early in the development process. Incorporating these practices ensures that any potential security flaws are corrected, enhancing the application's overall integrity and reliability against malicious attempts.

In contrast, while restricting user access to applications is important for adding layers of security, it primarily deals with access control rather than addressing the inherent vulnerabilities within the application itself. Implementing user training programs can support security awareness but does not directly tackle the technical aspects of application security. Creating multiple applications may diversify functionality but does not contribute to enhancing the security of any individual application. Therefore, focusing on finding and preventing vulnerabilities is essential for a comprehensive approach to application security.