Implementation of quantum cryptographic protocols in practical photonic systems

Eleni Diamanti

Eleni Diamanti

Maddila Akhilesh, Naidu Thanusri, PasalaSanyasi Naidu +2 more

Quantum Key Distribution (QKD) brings a revolutionary approach to secure communication by using the principles of quantum mechanics to safeguard the transfer of cryptographic keys.This project explores the practical deployment of two foundational QKD protocols: BB84 and E91.The BB84 protocol secures key distribution through photon polarization, while the E91 protocol uses the unique properties of quantum entanglement to enhance resistance to eavesdropping.By contrasting these quantum methods with classical cryptographic techniques, the study provides a comprehensive look at their relative strengths and limitations.Practical implementation and thorough analysis demonstrate that QKD protocols offer significant advantages in preventing interception, shedding light on their potential role in advancing cryptographic security in the era of quantum technology.This research not only assesses the practical challenges of implementing QKD but also considers future advancements that could broaden its real-world applications.

Alasdair B. Price

J. Barnabas Paul Glady, D. N. S. Ravikumar, B. Padmanabhan +3 more

The rapid advancement of quantum computing poses a critical threat to traditional cryptographic methods grounded in computational complexity. As quantum computers progress, their ability to undermine existing cryptographic systems necessitates the emergence of quantum-safe cryptographic techniques. Quantum cryptography, offering protocols impervious to algorithmic and computational progress, offers a promising solution. However, ensuring the practical implementation of these protocols aligns with theoretical security is essential. This research article aims to enhance the implementation security of quantum cryptography. It focuses on bridging the gap between theoretical security and practical realization of quantum cryptographic protocols. By addressing potential vulnerabilities and side-channel attacks, the research work proposes strategies to fortify system security. The investigation also includes exploring techniques for validating and certifying the security of quantum cryptographic systems. The research questions include identifying vulnerabilities, quantifying information leakage, suggesting hardware and protocol adjustments for improved security, investigating quantum correlations for hardware testing, and collaborating on standards. The methodology involves a comprehensive literature review, vulnerability identification, leakage quantification, strategy proposal, experimental validation, and partnership for standards. Expected outcomes involve the identification of vulnerabilities, methods to quantify information leakage, proposed strategies, experimentally validated solutions, and contribution to security standards. Ultimately, this research will empower the development of robust quantum cryptographic systems resilient to potential threats. By enhancing quantum cryptography's implementation security, it will facilitate the adoption of quantum-safe cryptographic techniques in the face of evolving quantum computing technologies.

Nobuyuki Imoto