New! Fourth generation of the Opendime: a small USB stick that allows you to spend Bitcoin like a dollar bill. Pass it along multiple times. Connect to any USB to check balance. Unseal anytime. Trust no one.
BASED ON PRIVATE KEYS
Each Opendime holds one private key. It publishes the public key (payment address) to anyone and never reveals the key until “unsealed”.
PIGGY-BANK ECONOMICS !?
Yes. It’s like a piggy-bank. You must destroy it to spend the funds. At first that seems expensive and wasteful, but it’s a key part of our security model: you can trust a sealed Opendime, and it’s obvious when it’s been opened.
INSTANT AND OFF-CHAIN
Since we are putting private keys into a physical form you can trust, you can simply hand around Opendime units to move amounts around. There are no pre-defined Bitcoin amounts with Opendime either. Store as much or as little as needed.