Cryptanalysis and Improvements on Some Graph-based Authentication Schemes

TL;DR

This paper analyzes the security flaws in certain graph-based authentication schemes introduced in 2010 and proposes new schemes to address these vulnerabilities.

Contribution

It provides the first cryptanalysis of these protocols and introduces improved schemes to enhance security.

Findings

Identified vulnerabilities in existing graph-based authentication schemes.

Proposed new schemes that fix identified security issues.

Enhanced security features in the revised protocols.

Abstract

In 2010, Grigoriev and Shpilrain, introduced some graph-based authentication schemes. We present a cryptanalysis of some of these protocols, and introduce some new schemes to fix the problems.