Checkoin

An open source standard to secure the circulation of physical items such as cryptocash. It allows to checking the integrity of physical cryptocoins without having to break their sealing, like checking a banknote under a UV blacklight. Thus, they can circulate safely, by hand from peer-to-peer, until they eventually get cashed by having their irreversible sealing opened, then trashed. Checkoin Coins present a Visible Scan Data on their outer surface. When a user gets a Coin handed to him/her, the user Scans the Visible Scan Data of the Coin with a blacklight application (or device) to check the Coin. Still under development.