[kawsper]

I even have a ring that runs JavaCard software on its JVM, they are sold for cheap, and I bought one just for fun and history, there is an eBay listing here: http://www.ebay.co.uk/itm/JAVA-RING-RARE-Sun-Microsystems-JA...

[hvidgaard]

That seems like a great way to distribute some secret. Create an Arduino reader for the ring, save the secret in a format that requires 3 out of 5 rings to reconstruct and store them apart.

Only the most persistent and knowledgeable about the ring will go through the trouble to get the data off it.

[Gruselbauer]

That is the weirdest ebay listing I saw in a while. Also I want to have one super-badly now. Thank you :)

[pjmlp]

I remember the JavaONE when they were given. Oh getting old!

[spullara]

I think I still have one somewhere from that JavaOne.

[jaytaylor]

What can you actually do with it?