Secure hardware device for off-chain in person transactions. What was it called?

[Anon136]

I cant for the life of me remember the name of this project from atleast a couple of years ago to develop a secure hardware device for in person off chain transactions. It would help if I could describe how it was supposed to work but honestly that's why I'm trying to remember the name of it, so I can look it up and figure that out. What I do remember is that it would only work by interfacing with another of the same device very near to it. Supposedly you could keep passing on bitcoin from one device to the next and the next and it would rely on people settling on chain often enough to make it not worth a hackers time to try to compromise the hardware based security to get at some earlier link in the chain. It would rely on hardware encryption provided by the company that made it, a much less secure solution than a blokchain, but the idea was for it to be secure enough for small every day transactions that were settled on chain relatively frequently.

Sorry I wish I could remember more but does anyone know what project I'm trying to remember?

[xdrpx]

I'm not a 100% sure, but it's just a poor guess based on my previous videos that I had watched about the product. Are you by any chance talking about Coolwallet by CoolBitx? It allows transactions to happen through those NFC cards to transfer the funds. People could have used it as a cold wallet. Putting this here for your reference to remember : https://www.indiegogo.com/projects/coolwallet-most-convenient-bitcoin-cold-wallet#/

The only other hardware device I remember is OPENDIME but it's just a hardware device that people personally hand over to each other, and not something that communicates when brought near to another device. Also these were disposible devices with the idea to use it as cash. Also, putting this here for your reference to remember https://opendime.com/

If it's neither of those two, then I'm sorry that I couldn't help you remember the device name.

[Anon136]

Super cool of you to try and help. Thanks.