On the impact of discretization on the practical secrecy of keys, formed by the interval scheme

Often the key bits generated by physical random number generators are not realizations of jointly independent uniformly distributed random variables, which gives rise to the concept of «practical key secrecy». For some physical random number generators this deviation is caused by the discreteness of time measured by electronic components. In this paper, for a physical random number generator model based on the interval scheme, we obtain bounds on the practical secrecy of keys taking into account the impact of measurement time discretization.