Security in APIs: Implementation of OAuth 2.0 and OpenID Connect in Applications, with a Focus on Protecting Sensitive Data

This article explores the importance of security in APIs, highlighting the OAuth 2.0 and OpenID Connect protocols as effective solutions for authentication and authorization. The functioning of OAuth 2.0 is detailed, including its main steps and implementation examples in C# and Go. OpenID Connect is presented as an identity layer on top of OAuth 2.0, with its peculiarities and practical implementations.