2
$\begingroup$

As far as I understand, CV-QKD (also here) uses coherent states to send a key, that is encoded in amplitude and phase quadratures. When someone tries to eavesdrop, this will introduce an error and therefore the eavesdropper is detected. I think I can see that an intercept/resend attack of any kind would introduce such an error. What I do not understand, however:

How is the error introduced if and eavesdropper just taps a few of the photons?

$\endgroup$

0

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Browse other questions tagged or ask your own question.