When the game came out, everything could be trades by hash value.
You famed and you got rewarded a little bit of copper or silver from that kill and to generated a new spawn you need to wait for a new md5 hash to be generated by the system.
The format has always been known to be MD5 hashing algorithm and thats why duping and exploting cryptocurrency in WOW has never been possible.
Now the secret is out, Blizzard World of warcraft is the creator.
By the way, who let the dogs (secret) out?
Is this hearsay, or a rumor that's been going on recently?
Hope to get some more information about this, citing links would certainly be appreciated.