# Gavin Andresen
# 2010-07-17 20:22:59
# https://bitcointalk.org/index.php?topic=430.msg3794#msg3794

@s{quotedtext}
@s{quotedtext}
If that coin is one of the inputs to a later valid transaction, then it is spent and cannot be spent again. @p{par}

That later transaction is the record that somebody spent the coin; it is signed with the private key, and that key (which Bitcoin keeps for you in your wallet) should be known only to the owner. @p{brk}