You can make a JWT invalid after 30 seconds or even 1 second. You should set an aud (audience) when creating the JWT. Otherwise the signature is crypto-graphically sound. Validate every single JWT every single time with a short lifetime.

OIDC tokens are all JWTs btw.

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tracker1 6 hours ago | parent [-]

If your talking about a browser context, where the authority is separate from the requesting body, then expiring even at 30s is excessive for user context, let alone every 1s or every request... you're effectively then inflating every single API request into 2 requests... one for a new token, then another to the API being called. This is irresponsible for not much gain in a user-facing context.

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hparadiz 6 hours ago | parent [-]

You should not be using them for user contexts at all. The cookie should be the session token and the sessions should be stored on the server side where you can simply delete them and the user's login becomes invalid. Using JWTs for this use case is just plain wrong.

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tracker1 4 hours ago | parent [-]

I disagree with you and the article on this... I thought that was pretty clear.

You can use a revocation list with JWT if necessary, and if your JWTs never last more than 15m you'll be fine.. and if your security window is tighter than that, you probably have bigger issues to deal with.

	▲	hparadiz an hour ago \| parent [-]
		I think you can use a JWT just fine to introduce a new user into a system but once authenticated just set a classic session cookie with an expiration. I get when you can't for like an API and sure that's where JWTs are best. But a regular website? Not the biggest fan.