Example Concept: Implement OAuth 2.0 for secure API authentication and authorization. OAuth 2.0 provides a token-based access control mechanism, allowing applications to access resources on behalf of a user without exposing their credentials. Additionally, use TLS (Transport Layer Security) to encrypt data in transit, ensuring that sensitive information is protected from interception. Regularly audit API access logs and integrate with a Security Information and Event Management (SIEM) system to detect and respond to suspicious activities promptly.