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Not just that. They have to be designed securely so they work in face of both logical and physical attacks. Security-focused diodes are supposed to include thin
by nickpsecurity 7y ago
Not just that. They have to be designed securely so they work in face of both logical and physical attacks. Security-focused diodes are supposed to include things such as emanation attacks. They're not cheap. Even the cheaper setups would be better than software-based security, though.
- amluto 7y agoDoes any of that actually matter in a realistic threat model in an airplane? The integrity of the critical systems matters, but there shouldn’t be any secrecy concerns. An attacker learning the full state of the avionics computer would be of little value. Similarly, a side channel from the entertainment system to a critical system shouldn’t matter unless the critical system is already compromised, since the critical system won’t be listening to the side channel.