From cold resistor to secure key exchanger

TL;DR

This paper presents a secure key exchange system based on cold resistor circuitry, demonstrating its design, simulation, and security characteristics, which are steady-state secure but vulnerable during transients.

Contribution

It introduces a novel key exchange system utilizing cold resistor circuitry, extending previous concepts and analyzing its security properties and transient vulnerabilities.

Findings

System is secure in steady-state conditions

Transient vulnerabilities can be exploited to crack the system

Circuit realization and simulation validate the design

Abstract

Utilizing a formerly published cold resistor circuitry, a secure key exchange system is conceived and explored. A circuit realization of the system is constructed and simulated. Similarly to the Pao-Lo key exchanger, this system is secure in the steady-state limit but crackable in the transient situations.