??????? ??? ??? ??? ??? ?? ????? ?? ? ?? ??? ??? ??? ?????. ???, ??, ???? ?? ??? ???? ???? ?? ??? ??? ???? ????, ??? ???? ??? ?????? ???? ???? ? ?? ???? ?? ? ????.Conclusion-to-end encryption means that only the sender and recipients hold the keys to encrypt and decrypt messages. The company supplier who controls the technique by which the buyers