One of my favorite quotes is from Arthur C. Clarke: "Any sufficiently advanced technology is indistinguishable from magic." This statement has never felt more tangible than in recent years, with technology evolving at a breathtaking pace. In this context, fantasy narratives emerge as great tools to aid in the understanding of technology; after all, technology and magic are, in a way, two sides of the same coin. Thus, let's talk a bit about the hash function, with a little help from Harry...