Interface Security Requirements

Correct Answer: OAuth 2.0 with JWT tokens

OAuth 2.0 with JWT tokens is the preferred authentication protocol for third-party service integrations because: - It provides a standardized, secure framework for authorization - JWT tokens offer efficient, stateless authentication - It supports different authorization flows for various use cases - It's widely adopted by major service providers - It offers good scalability and maintenance Why other options are less suitable: SAML 2.0 is primarily designed for enterprise SSO and is often too complex for third-party API integrations. Basic authentication with encrypted credentials is too simplistic and lacks important features like token management and scope control. OpenID Connect with biometric verification is excessive for service-to-service integration and typically used for end-user authentication scenarios.

Correct Answer: Implementing end-to-end encryption with standardized protocols across all integration points

Implementing end-to-end encryption with standardized protocols across all integration points is the best approach because: - It provides consistent security across the entire system - Standardized protocols ensure compatibility and maintainability - It reduces complexity in security management - It meets common compliance requirements - It facilitates easier troubleshooting and updates The other options are incorrect because: Applying different encryption methods for each component creates unnecessary complexity, increases security risks, and makes maintenance difficult. Using basic SSL encryption at the network layer only provides surface-level protection and does not adequately secure data throughout its lifecycle in the system. Implementing encryption only at critical points leaves internal communications vulnerable to attacks and creates security gaps that could be exploited by malicious actors. When integrating with legacy systems, maintaining consistent, comprehensive encryption is crucial for ensuring data security throughout the entire integration process.

Correct Answer: Implement sliding sessions with automatic token renewal before expiration

Implementing sliding sessions with automatic token renewal before expiration is the most appropriate token refresh strategy because: 1. It provides continuous security while maintaining user experience 2. Prevents session timeouts during active use 3. Reduces authentication overhead 4. Follows security best practices for mobile applications Other approaches are less effective because: Basing updates on user activity patterns and system load is unpredictable and may compromise security. Static token timeframes with mandatory re-authentication create unnecessary friction and poor user experience, especially for mobile users. Generating new tokens only for high-security transactions leaves regular operations potentially vulnerable and does not align with consistent security principles.