Hi,
The encryption is done entirely on the microcontroller, it is an atmel at32uc3a3256s.
Yes, you can upgrade the crypto algorithm, the firmware is upgradeable. It is currently 256bit AES cbc-essiv with pbkdf2 hmac-sha256. We will offer a few options for crypto, but unless a more secure option that will work with the atmel crypto accelerator is found we will keep this as primary.
the raid functions are in their early stages and are very very basic. we will expand the functionality when we finish up some of the more important functions. there is no crc or consistency checking now and there is not way to rebuild a mirror. the code is not yet suitable for production use.
Yes, you can swap out the sd cards. the salt is stored in the mcu (the aeskey is not stored at all). All sd cards would use the same password/salt/aeskey. We have plans to have different passwords for each sd slot, but still the same situation would exist that alternate cards would use the same password since the salt is stored in the mcu. If you want to do a custom firmware I could suggest how to accomplish something like this, maybe when things slow down a bit we can help with it.
We have tested up to 32GB cards (sdhc), i havent had any higher capacity to play with yet. We are working on sdxc support which will give a limit of 2TB per card, as soon as they make them :)
There is no difference between the US and Canadian versions; they are exactly the same. Originally when we posted the indiegogo we understood the export laws to restrict any sales to outside the USA. We then learned Canada is exempt from this. We do have a worldwide version also, but it is missing the mcu since that is the restricted part for export. We are still looking into export laws, if anyone can help with this we would be very happy and will likely reward you with thanks, appreciation and probably tangible things from our office.
Yes, we can have firmware that will emulate a usb hid/keyboard with this mcu. We are considering this option, but we dont want to step on any toes. There are already some great solutions for this. Check out the rubber ducky from
hak5.org, that is probably what your looking for.