# Gavin Andresen
# 2012-09-20 19:14:39
# https://bitcointalk.org/index.php?topic=110749.msg1207474#msg1207474

@s{quotedtext}
@s{quotedtext}
 @p{brk}
Yes, go ahead and implement it.  Here's a thumbnail sketch of one way to start: @p{par}

+ Create a web service that lets anybody upload their email address and a list of public keys. @p{par}

+ Send the user an email whenever 'tainted' coins are sent to any of those public keys, telling them how tainted they are and where they came from. @p{par}

That's it. @p{par}

For extra credit, you could let users upload their wallet.dat files (private keys encrypted, I would hope) and auto-extract all the public keys in the wallet.  Heck, if you stored the private-key-encrypted wallet.dats you might be able to charge a little for both blacklist detection and wallet backup. @p{par}