??????????? ??? ????? ??? ?? ????? ???, ? ?????, ? ???????, ? ???? ??? ? ??????? ????????? ?? ?????????. ?????? ?? ????? "???? ?? ?????? ????? ????????? ???? ??????".Cryptocurrencies use various timestamping strategies to "demonstrate" the validity of transactions extra to the blockchain ledger with no require for any trustworthy 3rd party.Cookie C