Bad Crypto: Chessography and Weak Randomness of Chess Games

TL;DR

This paper critically evaluates the Chessography encryption scheme, revealing its flaws, redundancy, and unjustified security claims, while also highlighting insufficient randomness in chess game positions.

Contribution

It provides a detailed critique of Chessography, demonstrating its security flaws and analyzing the randomness in chess game positions.

Findings

Chessography encryption scheme is incorrect and redundant.

Security claims based on chess complexity are unjustified.

Final chess positions exhibit insufficient randomness.

Abstract

This short communication shows that the Chessography encryption scheme is incorrect, redundant, and the the security claims based on the complexity of chess games are unjustified. It also demonstrates an insufficient randomness in the final chess game positions, which could be of separate interest.