You can "just" use a per-user "generation" key, which invalidates all keys when incremented server-side. The list can generally be mainted by polling every few

You can "just" use a per-user "generation" key, which invalidates all keys when incremented server-side. The list can generally be mainted by polling every few seconds or via a websocket if you need the fastest possible expiry. Since most JWT libraries allow you to customize the validation function it's often pretty trivial to add, and overall comes only with a small memory penalty.