Bit commitment as an introduction to quantum cryptography

Abstract

Abstract This paper analyzes some of the drawbacks of Bennett & Brassard’s quantum key distribution protocol when used in an educational setting introducing components of quantum cryptography. We propose to utilize a quantum bit commitment protocol instead in order to avoid the outlined difficulties. Additionally, we present implementations of the latter protocol in two different programming paradigms which may either be used as a practical demonstration tool for holding a quantum bit ballot, or as a means to foster an in-depth understanding of the cryptographic protocol amongst pupils with a background in computer science.