can i Use a Raspberry Pi as a air gap set up?
I have heard that some people will use a separate computer for decrypting messages. When they revive a message they will put it on a thumb drive and then they will carry it to a separate computer that is not connected to the internet, they will then decrypt the message.
Would the Raspberry Pi be a good computer for the decrypting of messages encrypted with RSA?
I have a Certification Authority set up in a Raspberry Pi, with an Air Gap model, running xCA, which runs great on the Pi, by the way.
It can do even asymetric cryptography without problems, but I would say you have to measure the amount of cryptography and the response time you need, given that very large amounts of data can take a while to process. I don't think that will be a problem, though.
As for scruss answer about the Pi not handling USB insertion/removal right, considering I don't think you will be doing that many times per hour, so, if a reboot is acceptable (as it is in my case) it doesn't turn out to be a real issue.
I'd say no.
Not because of lack of computing power — Gerben's comment is dead right — but because the Raspberry Pi doesn't handle external USB insertion/removal well. Some models will reboot on inserting a USB device.
