If GPS satellites signed their messages, they would not be spoofed so easily. Being jammed is bad, too, but spoofed is far worse.https://twitter.com/jtemperton/status/910816052942163969 …
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Replying to @el33th4xor @jedisct1
Can’t you still spoof signed message streams just by recording the real thing and adding varying delays?
5 replies 0 retweets 9 likes
Exactly. Signing isn't a magic wand you can wave for a unidirectional time-of-flight system.
7:29 AM - 21 Sep 2017
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