A Non-Interactive Dual Channel Authentication Protocol for Assuring Pseudo-confidentiality

We introduce a non-interactive dual channel authentication protocol and apply it to long distance communication for assuring pseudo-confidentiality, a criteria that prevents a malicious agent from exfiltrating information to unauthorized destinations. Unlike previously proposed protocols that assume a manual (human-aided) or equivalent authenticated channel, our protocol utilizes a non-manual authenticated channel. We analyze the security properties for a possible realization of this protocol and develop a prototype. Through a Raspberry-Pi implementation, we show how the incorporation of the proposed scheme into the future design of keyboard interfaces may impact authentication practices.