qrypt0 - encrypted short messages exchanged between offline computers
This addresses security for users needing to communicate between isolated systems without network access, but it is incremental as it builds on existing cryptography and QR code methods.
The paper tackles the problem of securely exchanging encrypted short messages between permanently offline computers, achieving protection from malware that could bypass encryption by using QR codes for transmission.
A system is described for exchanging encrypted short messages between computers which remain permanently isolated from any network accessible to the attacker. The main advantage is effective protection of these computers from malware which could circumvent the encryption. For transmission, the ciphertext is passed between isolated and connected computers in the form of a QR code, which is displayed on and scanned from a screen. The security of qrypt0 therefore rests on the cryptography and the computer's physical isolation rather than on the computer security of the encrypting device.