Аннотация
In recent decades, quantum cryptography has made its way from scientific researches to practical implementations and commercial use. The absolute advantage of using quantum methods of information protection is independence from the computing capabilities of an attacker. In addition, due to the use of unique properties of quantum methods, it becomes possible to achieve an unprecedented level of security with the possibility of detecting the violator during the operation of some protocols in online mode. However, although many questions and problems in quantum cryptography have already been solved, there are still many unresolved ones. The use of ternary pseudorandom sequences raised the question of the statistical reliability of these sequences. And although today there are a large number of different methods for evaluating the randomness of a sequence, however, they are mostly aimed at evaluating standard binary sequences. This work is devoted to the method of evaluating ternary sequences, one of the stages and an experimental study are presented.