Bridging the air gap with quill and QR codes

Summary

If you are using quill on an airgapped machine, you can use QR codes to "bridge the air gap" by sending the signed messages 'crafted' in quill.

Basic steps

1. Air-gapped machine: Create a signed message (message.json) in quill
2. Air-gapped machine: Convert the signed message into QR codes
3. Networked smartphone: Click "send" to send the message to the IC

Step 2:Convert the signed message into QR codes

message.json

file actually has multiple messages for the Internet Computer, so you will run a script that will put you in the following loop:

1. Run script
2. QR code is generated
3. Scan QR code with your smartphone
4. Hit ENTER and return to step 2
5. The command will break up all the messages in message.json into QR codes you will scan sequentially in the following steps.

On the air-gapped machine:

$ bash ./quill-qr.sh < message.json

Step 3: Scan the message-turned-QR code and go to the website

Step 4: Networked smartphone: Click "send" to send the message to the IC

What kind of website the QR code will open on your smartphone:

Scroll down and click on send: