Beyond Current Cryptography

Abstract

Cryptography has evolved significantly, from simple ancient ciphers to sophisticated algorithms to secure modern digital communications. The advent of quantum computing and increasing cyber threats represents a paradigm shift, challenging traditional cryptographic methods and necessitating the development of quantum-resistant algorithms. The chapter discusses this advancement by focusing on core principles such as superposition, entanglement, and the no-cloning theorem, which provide improved security measures. It investigates several quantum key distribution protocols and novel solutions, including quantum secure direct communication and deterministic secure quantum communication. This chapter also addresses the challenges posed by quantum computing to existing cryptographic systems by investigating post-quantum cryptographic algorithms and emphasizes technological and ethical considerations in the practical implementation of quantum cryptography The chapter concludes by emphasizing the importance of striking a balance between innovation and ethical responsibility.