Opendime v2 – Genuine Verified Bitcoin Credit Stick

Open dime is a small USB stick that allows you to spend Bit coin like a dollar bill. Pass it along multiple times. Connect to any USB to check balance. Unseal anytime to spend online.
Hopefully everyone who needed an Open dime for Christmas has got it under the tree already, because we are now out of stock! But the big news is we’ve redesigned the hardware and improved it. Same price, same concept, but some useful improvements:

  • we’ve added a special security chip, the sole purpose of which is to defeat any attempt at building counterfeit or cloned Open dime
  • a new “unseal” mechanism: stick a paperclip into the hole to break, instead of the tab
  • lanyard hole added, corners rounded, and 5mm shorter
  • lots of decoration on PCB to celebrate Bit coin and make it look like a precious object that can hold unlimited monetary value… because it is, and it can.

Order now to get in on the first build of the V2 product at pre-sale prices. We plan to be shipping them March 2017!

To everyone who’s supported us and helped educate the masses about our product: Thank you! Without you Open dime would not be possible. Let’s show the world how to do Bit coin with the privacy and immediacy of cash.

Anti-Counterfeiting Chip

We’ve added the Atmel ATECC508A to our board. This little chip is very powerful and does SHA-256 hashing, true random number generating (TRNG) and public key signing (ECDSA) on the NIST 256-bit curve named “P256”. (As Bit coiners, we say it works on the ‘wrong’ curve, and not the one true curve that Satoshi so wisely picked… but it’s just as secure and exactly the same math.)
This chip holds a number of secret keys that are impossible to extract, and we will be publishing a whitepaper to describe everything it does in great detail. At a high level, the important point is this security chip holds a “factory key” that only the Coin kite factory knows. We will publish the public part of this key, and you can use the signatures that this chip makes to verify that you are connected to a real Open dime. It will also verify that it’s a unique device and that it’s paired to the microprocessor that it was originally built with.
This additional chip does not affect how you use the Open dime and it’s completely optional to verify it, but if you do verify the signature from that chip, you can be 100% sure that you are talking to a genuine Open dime.
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