Protection is ensured considering that the vast majority of nodes will likely not take a alter if another person tries to edit or delete an entry in a single copy in the ledger.??? ???? ? ?? ??? ??? ???? ?? ??? ?? ?? ? ??? ????. ???? ??? ???? ?? ??? ???? ?? ??? ?? ?????. ????? ??? ????? ??? ????? ??? ? ??? ???, ?? ?? ??? ???? ?? ?? ???? ???? ??? ??