BoingBoing linked to this post on Watashi to Tokyo (Me and Tokyo) looking at how Japan's traditional hanko are vulnerable to fraud.
Hanko (also known as inkan) are carved seals or stamps used to mark legal documents, much as people in the West might "sign on the dotted line". But if someone manages to make a duplicate or forgery of your hanko, they can run around forging your mark on all sorts of important papers. Not good.
Well, Japan's centuries-old traditions may have created this problem, but its cutting-edge technology is solving it. Graphics tablet input device maker Wacom has teamed up with stamp maker Shachihata to invent what may be the world's first digital hanko the Inpplet:
Obviously, the Inpplet won't make fraud any tougher in cases where an original paper document is required, but it does bring the Japanese cultural practice of stamping important documents into the digital era.