While the idea of a hardwallet is of course a good one, I'm not really into idea of connecting them to the internet directly in any way for obvious security reasons.
I've thought about building something like the Trezor myself but with added Bluetooth so it can be used for signing wirelessly.
Shouldn't be an issue with ports blocked and no internet access.
wanna listen to one of my safer idea?
Make a client on all machines that communicates with QR code input.
And your hardwallet generates private key SIGNED special code with the qr code for the client to read, and the client just relay the message to the QT.
client will keep track of the public key and can be used to check the balance, and send necessary information through QR code back to your hard wallet so it know which block to sign.
Cumbersome but secure, as the hard wallet is taking very limited input and outputs and cannot be accessed any way but physically.
Like I said I want this to be easy and mobile not for the incredibly paranoid seeking utmost security. This would be fine for home transactions however is still a pain and would not be as portable. Just seems overkill when a hardwallet like this should be secure enough.
OP if using a raspberry PI. your forgetting two things.
1. power (imagine carrying large battery pack)
2. power switch.
3. camera for QR codes
now imagine your raspberry pi with the touchscreen, camera and a batterypack. even layered ontop of each other its still an inch thick.
where as using a cheap ipaq/under $40 cell phone and reprogramming/rooting it to change the OS to a more secure specification is much better. plus it comes with a camera built into it for QR code scanning
simply find a rootable phone/PDA, put ubunto on it (whichever version you prefer) job 98% done for your prototype
I was actually looking at this however most phones are simply ugly and are difficult for it to reprogram a new OS onto like Linux. To be honest I also liked the idea of it being usable as true cold storage as well with no inbuilt WiFi though the price seems to be quite large for the components.
However if anyone knows of a device with a camery, battery, possible wifi and touchscreen that is able to support Linux for under $100 please tell me as that would be amazing.
