The Complete Guide to API Security: From Authentication to Zero Trust
APIs are the backbone of modern software — and the biggest attack surface. OWASP’s API Security Top 10 shows that broken object level authorisation, broken authentication, and excessive data exposure account for the vast majority of API breaches.
Authentication vs. Authorisation
Authentication asks “who are you?” Authorisation asks “what can you do?” Most API vulnerabilities stem from confusing the two. Use OAuth 2.0 and OpenID Connect for authentication, and implement fine-grained role-based access control for authorisation.
