What are the best practices for securing JWT in ASP.NET Core?

What are the best practices for securing JWT in ASP.NET Core?

To secure JWT in ASP.NET Core, consider the following best practices: 1. Use strong signing algorithms like RS256. 2. Keep your signing keys secret and rotate them regularly. 3. Set appropriate token expiration times. 4. Validate tokens on every request. 5. Use HTTPS to protect tokens in transit.

How can I implement token expiration in my application?

You can implement token expiration by setting the 'exp' claim in your JWT payload. This claim should contain a timestamp indicating when the token will expire. Additionally, configure your authentication middleware to reject tokens that are expired.

What should I do if a token is compromised?

If a token is compromised, you should immediately revoke it by changing the signing key or implementing a token blacklist. Additionally, inform users to log out and re-authenticate.

Are there any libraries you recommend for handling JWT in ASP.NET Core?

Yes, I recommend using the 'System.IdentityModel.Tokens.Jwt' library for handling JWT in ASP.NET Core. It provides robust support for creating and validating tokens.