Are there any OpenSource projects supposed to create hardware Trezor-like device based on widely available Atmega devices or Raspberry Pi?
I have seen ECDSA implementation for Arduino, but it is very little to start with. Yes, Raspberry Pi may be a good option, it is an actually full-featured computer, but this makes it opened to a number of security flaws, bugs and unknown breaches.
Your opinion?
I think the raspberry pi is good for a cold storage device.
If you download the wallet software on an online computer and an offline computer (the raspberry pi). Then sign transactions on the raspberry pi with inputs you can load from the online software and the broadcast the signed transaction on the online computer.
Plugging a raspberry pi into a computer means you lose what you were using the pi for as you can just access the drives on the pi almost as easily as you can your PC.
