API Security: Protecting Application Interfaces
API security protects application programming interfaces (APIs) from unauthorized access, misuse, and attacks.
API security is essential for modern software, as APIs connect applications and services. It involves authenticating users and applications, authorizing access to resources, encrypting data, monitoring traffic for threats, and validating requests to prevent common vulnerabilities like injection, broken authentication, and excessive data exposure. Strong API security maintains data integrity, confidentiality, and availability, protecting sensitive information and user trust.
graph LR
Center["API Security: Protecting Application Interfaces"]:::main
Pre_api_development["api-development"]:::pre --> Center
click Pre_api_development "/terms/api-development"
Pre_authentication["authentication"]:::pre --> Center
click Pre_authentication "/terms/authentication"
Pre_authorization["authorization"]:::pre --> Center
click Pre_authorization "/terms/authorization"
Rel_api_gateway["api-gateway"]:::related -.-> Center
click Rel_api_gateway "/terms/api-gateway"
Rel_microservices["microservices"]:::related -.-> Center
click Rel_microservices "/terms/microservices"
Rel_cybersecurity["cybersecurity"]:::related -.-> Center
click Rel_cybersecurity "/terms/cybersecurity"
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🧠 Knowledge Check
🧒 Explain Like I'm 5
APIs are like secure doors to different rooms. [API](/en/terms/api) security means using strong locks, guards, and cameras on these doors to ensure only authorized people enter specific rooms without unauthorized access or theft.
🤓 Expert Deep Dive
API security employs a layered strategy, often using standards like OAuth 2.0 and OpenID Connect. Key elements include input validation (e.g., JSON schema), rate limiting, TLS/SSL encryption, and monitoring for anomalies. Advanced methods involve WAFs, API gateways for policy enforcement, and adherence to OWASP API Security Top 10. Principles of least privilege and zero trust are also critical for API interactions.