Secret management in DevSecOps focuses on securely storing, accessing, and rotating sensitive information such as API keys, passwords, tokens, certificates, and encryption keys throughout the software development lifecycle. Effective secret management involves using dedicated tools like vault systems, environment isolation, role-based access control (RBAC), encryption at rest and in transit, and automated secret rotation to reduce the risk of leaks or unauthorized access. It is also important to integrate secret handling into CI/CD pipelines while avoiding hardcoded credentials in code repositories. In your opinion, what are the most effective strategies for managing secrets securely in modern DevSecOps environments, and what challenges do organizations face when implementing these practices at scale?