Fig. 1: Key rates for the B92 protocol as a function of the depolarising probability p for \({\varepsilon }^{{{{{{{{\rm{cor}}}}}}}}}=5\cdot 1{0}^{-11},{\varepsilon }^{\sec }=1{0}^{-9}\), and εcomp = 10−2. | Nature Communications

Fig. 1: Key rates for the B92 protocol as a function of the depolarising probability p for \({\varepsilon }^{{{{{{{{\rm{cor}}}}}}}}}=5\cdot 1{0}^{-11},{\varepsilon }^{\sec }=1{0}^{-9}\), and εcomp = 10−2.

From: Security of quantum key distribution from generalised entropy accumulation

Fig. 1

The dashed line shows the key rate in the i.i.d. asymptotic setting, i.e. assuming that Eve behaves the same in each round and infinitely many rounds are executed. We see that as the number n of rounds in the protocol increases, the finite-size key rates against general attacks approach the i.i.d. asymptotic rate.

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