Quantum-Resistant Cryptography: Preparing Digital Assets for the Post-Quantum Era

The advent of quantum computing has profound implications for digital security. Traditional cryptographic methods, which currently protect online banking, secure communications, and digital asset transfers, stand at risk of obsolescence once large-scale quantum computers become a reality. This chapter offers a conceptual and theoretical exploration of quantum-resistant cryptography within the broader context of post-quantum security. It examines key theoretical frameworks underpinning cryptographic protocols, highlights the historical and contemporary debates on transitioning to post-quantum algorithms, and synthesizes existing scholarly research to identify enduring gaps. The chapter proposes new conceptual models to guide practitioners, policymakers, and researchers as they navigate the complex shift from classical cryptography to quantum-resistant techniques. By analyzing essential constructs such as lattice-based cryptography, code-based approaches, and multivariate polynomial cryptosystems, the discussion illuminates both challenges and opportunities.