A REVIEW OF COPYRIGHT

?��? ?�자 지�??�공?�들?� ?��????�용?�들??받는 ?�람??지�?주소??묶인 ?�메??주소�??�력?????�게 ?�니??All transactions are recorded on the internet in a very digital database named a blockchain that uses effective just one-way encryption to ensure safety and proof of ownership.비트코인?� ?�