Implementing authentication for third-party access is no small feat, but is imperative in order to compete in a complex API economy and expand business capabilities. With every application, securing protected resources always poses a unique challenge, particularly considering how rapid technology evolves. New solutions come along and customers expect a level of consistency across apps, which is important to be mindful of in reducing friction (and generating revenue).
The OAuth 2.0 protocol is the industry standard for authorization. It focuses on client/developer simplicity, and enables secure access for desktop and mobile applications. Nearly everyone has come across this type of authentication with Single Sign On (SSO) options from companies like Google, Apple, or Linkedin, which keep you logged in across all of their products (view a full list of strategies).