Fig. 3

(a) This plot shows how the number of insecure raw key bits scales with the size of the sliding window. The dashed line shows the linear regression model that was fit to the dataset obtained via simulation. (b) This plot shows the standard deviation of the results from the simulation. It was observed that this data exhibits a square-root scaling, and so a square-root regression model was fit to this data. The dashed line shows this regression model. The solid green line is the analytic upper bound on this quantity, as obtained from the second term in Eq. (12), using a value of \(\varepsilon _D\) corresponding to 1 standard deviation obtained using Eq. (14). For these simulations, the same parameters as with Fig. 2 were used, and 2500 simulations were run for each window size.