Post‐Quantum Cryptography Methods
M. Kundalakesi, Manjula R. Devi · 2025
The rise of powerful quantum computers casts a long shadow over the world of cryptography. Traditional encryption methods, both symmetrical and asymmetrical, are facing an existential crisis. Algorithms like Grover's search pose a significant threat to symmetric systems like AES and 3DES, dramatically accelerating key discovery. Asymmetric algorithms, like RSA, Diffie–Hellman, and ECC, rely on the inherent difficulty of factoring large numbers and solving discrete logarithms. While classical algorithms struggle with these problems, Shor's factoring algorithm, designed for quantum computers, can solve them efficiently. This impending obsolescence of current cryptographic systems necessitates a proactive search for new solutions—post-quantum cryptography. This new era of cryptography demands a deep exploration of various post-quantum cryptosystem families. National and international organizations, like the NIST (National Institute of Standards and Technology) in the US, are actively involved in the standardization process for these new encryption methods. The urgency to develop and implement post-quantum cryptography stems from the inherent vulnerabilities of classical encryption systems when faced with the brute force of quantum computing. However, the story does not end there. The future holds the potential for a powerful synergy between the immense computational power of quantum computers and the strategic decision-making capabilities of artificial intelligence. By combining these two revolutionary technologies, industries can unlock a new level of optimization, innovation, and efficiency. This future, however, hinges on securing our communication channels with robust post-quantum cryptography, ensuring a safe and secure foundation for this technological leap forward.