Because an attacker can just replay legitimate broadcasts with slightly skewed time and origin and introduce huge errors into the fix.

Just because we can't solve all current problems doesn't mean we shouldn't solve any current problems.

If you want to prevent replaying as well, add a counter.

	▲	stinkbeetle 2 hours ago \| parent [-]
		> Just because we can't solve all current problems doesn't mean we shouldn't solve any current problems. Obviously not, but solving problems is always a cost benefit and we went from all spoofing is impossible to some spoofing is possible. What is the benefit of doing this and what is the cost? > If you want to prevent replaying as well, add a counter. It's not clear that would be able to prevent spoofing if the attacker could overwhelm and degrade the real signal.