Digital signatures with Quantum Candies
This is an incremental contribution aimed at individuals without background in quantum information processing, offering an intuitive teaching tool.
The paper tackled the problem of making quantum digital signatures (QDS) accessible by using the quantum candies (qandies) model to describe three QDS protocols, providing a pedagogical example without requiring knowledge of superpositions or complex algebra.
Quantum candies (qandies) is a pedagogical simple model which describes many concepts from quantum information processing (QIP) intuitively, without the need to understand or make use of superpositions, and without the need of using complex algebra. One of the topics in quantum cryptography which gains research attention in recent years is quantum digital signatures (QDS), involving protocols to securely sign classical bits using quantum methods. In this paper we show how the "qandy model" can be used to describe three QDS protocols, in order to provide an important and potentially practical example of the power of "superpositionless" quantum information processing, for individuals without background knowledge in the field.