Quantum Safe Cryptography

Bharat S. Rawal, Alexander Peter

Anonymous

Mikhail Pavlov

Abstract This practical guide provides an introduction to quantum-safe cryptography using IBM Q, based on the course Practical Introduction to Quantum-Safe Cryptography. It offers hands-on experience in applying quantum computing concepts to modern cryptographic challenges. The guide covers four key areas of cryptography: Cryptographic hash functions Symmetric-key cryptography Asymmetric-key cryptography Quantum-safe cryptography Through interactive examples and live coding exercises, developers gain insight into the evolving cybersecurity landscape in the quantum era, understanding how quantum computing impacts existing cryptographic schemes. The guide emphasizes practical steps to mitigate cryptographic risks and implement security strategies resilient against future quantum attacks. This resource bridges theoretical foundations with practical experimentation, equipping practitioners with the tools to design quantum-resilient applications and integrate quantum-safe practices into their software development workflows.

Jiabo Wang, Линг Лиу, Shanxiang Lyu +7 more

Abstract We present an overview of quantum-safe cryptography (QSC) with a focus on post-quantum cryptography (PQC) and information-theoretic security. From a cryptographic point of view, lattice and code-based schemes are among the most promising PQC solutions. Both approaches are based on the hardness of decoding problems of linear codes with different metrics. From an information-theoretic point of view, lattices and linear codes can be constructed to achieve certain secrecy quantities for wiretap channels as is intrinsically classical- and quantum-safe. Historically, coding theory and cryptography are intimately connected since Shannon’s pioneering studies but have somehow diverged later. QSC offers an opportunity to rebuild the synergy of the two areas, hopefully leading to further development beyond the NIST PQC standardization process. In this paper, we provide a survey of lattice and code designs that are believed to be quantum-safe in the area of cryptography or coding theory. The interplay and similarities between the two areas are discussed. We also conclude our understandings and prospects of future research after NIST PQC standardisation.

Christian Monyk

Richard Hughes