Though many of the concepts in this course are still relevant, overall this course does not reflect our current course standards.

Check out a free preview of the full Secure Authentication for Web Apps & APIs Using JWTs course:
The "JWT Authentication" Lesson is part of the full, Secure Authentication for Web Apps & APIs Using JWTs course featured in this preview video. Here's what you'd learn in this lesson:

Ryan now explains how JWTs are used to authenticate single page applications. When credentials are submitted the server signs and returns a token which is saved on the client. Every HTTP request moving forward will send the token as an Authorization header. This eliminates the need for the server to perform costly database lookups for verifying user access.

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