- #1

Nur Ziadah

- 35

- 3

I have some curiosity about MIM attack in a paper that I have been found before. The diagram shows the MIM attack between Alice and Bob:

I found that the sentences state:

"

How to derived

Thank you.

I found that the sentences state:

"

*We consider that the transmittance of the quantum channel is t. If Alice sends pulses with a mean photon number of N, Bob expects to receive pulses with mean photon number tN in the first stage and t*

φ"^{3}N in the third stage, and Alice expects to receive pulses with mean photon number t^{2}N in the second stage. Therefore, for the MIM attack, Eve can extract a mean photon number of (1-t^{2})N to obtain the estimateφ

_{1}and a mean photon number of t(1-t^{2})N to obtain the estimate θ_{B}.**Question**How to derived

*(1-t*

^{2})N and*t(1-t*?^{2})NThank you.