??????? ??? ??? ??? ??? ?? ????? ?? ? ?? ??? ??? ??? ?????. ???, ??, ???? ?? ??? ???? ???? ?? ??? ??? ???? ????, ??? ???? ??? ?????? ???? ???? ? ?? ???? ?? ? ????.End-to-conclusion encryption implies that just the sender and recipients keep the keys to encrypt and decrypt messages. The service company who controls the program by which the customer