A SECRET WEAPON FOR BITCOIN

A blockchain can be a distributed community ledger ??or on the internet digital databases ??which contains a document of all of the transactions on a System.?�러???�유�? 로그?? ?�출 ?�세??관�??�는 ?�티 ?�싱 ?�구???�???�중 ?�는 ?�중 ?�소 ?�증???�함?�여 교환???�는 ??지�??�공?��? ?�