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It is very easy to create backdoor classical encryption systems by adding multiple keys, especially for public key cryptosystems. If this is done in hardware, y
by AstralStorm 7y ago
It is very easy to create backdoor classical encryption systems by adding multiple keys, especially for public key cryptosystems. If this is done in hardware, you'd be hard pressed to find it.
Not so with quantum encryption. At least I'm not aware of research that shows that this can be done.
Though I have seen some interesting spying instead of the bass quantum encryption schemes which didn't use all of the phase and magnitude.
- matthewdgreen 7y agoI have no reason to believe this is true. Side channel attacks on QKD have been very effective, which is a strong indication that the ability to trust your hardware is essential to the functioning of these systems. You’re proposing a model where one cannot trust their hardware, and I see no evidence that modern QKD systems have been hardened against that attack. PS I’ve worked a lot on cryptographic backdoors in the non-QKD setting but I don’t work on QKD.