alt Hacker NewsIt's been a few years since I've worked with this stuff but I'm under the impression that you can do this sort of replay only for a short amount of time. If so, is there a point?
If the receiver expects a key to have been revealed at a particular timestep, it won't accept a replayed message with that key after that, so you can't record and replay indefinitely.
EDIT: Unless you indeed meant to instantly replay - would the receiver accept the highest strength signal, ie. yours?
Replies
15155 • yesterday at 8:45 PM
The point is to prevent missiles and drones from impacting their intended targets.
For most payloads and targets, this requires very little distortion.
I did indeed mean instant replay, and yeah the better your clock in the receiver the narrower the window of delay that the spoofer has to work with. If you can get the time from a 5G network or NTP down to 10ms, that'd mean you can detect being spoofed at >=3km distance if the spoofer has 0 delay (which is doable with a plain analog rebroadcast).