idea: QRcard - fully offline hardware wallet

[jago25_98]

 2 items required:

- eink display
^ display good enough to show QRcodes, eink seems most appropriate
- camera
^ this can be cheap and low quality.

The devices generates addresses and transactions, that's all. Interaction is done via the screen and camera, nothing else.

While I think the various hardware devices are great this is a lot simpler to communicate to people than USB sticks.

It would be simplest to use Android, or something that can run python and use a client that already exists.

I'd like to make such a device but it's beyond me.

[CIYAM]

I also created a topic along the same lines and think that it would be even more useful if it could do GPG via QR.

A simple QR code message protocol could be created to enable the device to perhaps do several things (such as GPG signing, BTC tx signing, BTC address signing, etc.).

As GPG is available for Android along with Bitcoin wallet implementations (based around deterministic wallets) I think this wouldn't be so hard to prototype on a more standard Android device.

If someone with the Android experience was interested and has the time to take this on then I'd be willing to offer some BTC towards it (and of course the project could be managed on CIYAM Open fee free).

[jago25_98]

All we need to have something workable ASAP is an android device with a camera and eink... but I don't think one exists (other than a Nook with USB camera clumsily hanging out)

Other than this I suppose there are android phones and cheap chinese tablets that you could solder over the wifi or try to put a switch on the antenna but they're not that small.