You ever felt unsafe creating a Bitcoin wallet on your desktop computer or on your smartphone? As such devices are often connected to the internet there might be a chance you have already been hacked and somebody could be stealing your private key(s). The solution is to create your private keys on a device that cannot be hacked because it is not connected to any other devices (e.g. no internet, ...).
This project aims for a microcontroller-based private key generation. The private key will be generated using rng. Your bitcoin address will then be calculated from your private key. Both will then be displayed on a display, for you to transfer on a piece of paper, which you will keep save. You can now use the address to transfer your bitcoins. Once you need your bitcoins, you simply import your private key in a wallet program and for safety reasons create a new paper wallet with this device. You can then use the bitcoins you need and transfer the rest to your new save bitcoin address.
Only use this project at your own risk. I am not responsible for your usage of this code. Furthermore, do not send bitcoins to any addresses in this repo.
Click here to see how to flash a pcb.
The wires are for my revision 1 board and are already fixed in the schematic.
Click here to see the RNG tests.
You can download all neccessary firmware libraries by executing sh firmware/lib/download.sh.
Firmware:
- https://github.com/micro-bitcoin/uBitcoin (MIT)
- https://github.com/marvinroger/ESP8266TrueRandom.git (LGPL-3.0 if ESP8266 is used)
- https://github.com/adafruit/Adafruit_BusIO (MIT, for SSD1306 display)
- https://github.com/adafruit/Adafruit-GFX-Library (BSD, for SSD1306 display)
- https://github.com/adafruit/Adafruit_SSD1306 (BSD, for SSD1306 display)
Only for address validation:
This project is licensed under gnu-gpl-v3.0. See License.txt for more information.