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Quantum Cryptography Resources

A curated library on how quantum mechanics is reshaping encryption — explainers, research papers, protocol learning material, and standards bodies and research institutes.

29 topics•5 categories•Updated October 2026

Articles & Explainers

7 entries

Readable introductions to quantum cryptography and how it differs from post-quantum cryptography.

01What Is Quantum Cryptography? (IBM)IBM's overview of quantum cryptography, QKD and related concepts. 02Quantum Cryptography: No Silver Bullet (CSO Online)Maria Korolov and Doug Drinkwater on what quantum cryptography can and cannot do. 03Post-Quantum vs Quantum Cryptography (Quantum Xchange)Explains the difference between post-quantum and quantum cryptography. 04Quantum vs Post-Quantum Cryptography (FedTech)Derek Rice on the difference between quantum and post-quantum cryptography. 05Quantum Cryptography and Privacy (IAPP)Prateek Srivastava on whether quantum cryptography can bring a new era for privacy. 06What Is Post-Quantum Cryptography? (NIST)NIST's plain-language explanation of post-quantum cryptography. 07Quanta Magazine – Quantum CryptographyFeature coverage of quantum cryptography research.

Research Papers

6 entries

Foundational and survey papers on quantum cryptography.

08Quantum Cryptography (Reviews of Modern Physics)Gisin et al.'s widely cited review of quantum cryptography. 09Secure Quantum Key Distribution with Realistic DevicesReview of QKD security when devices are imperfect. 10Advances in Quantum Cryptography (arXiv)Survey of advances in quantum cryptography. 11BB84: Public Key Distribution and Coin Tossing (arXiv)Bennett and Brassard's original BB84 quantum key distribution paper. 12Entanglement-Based Quantum Cryptography over 1,120 km (Nature)Experimental entanglement-based QKD over long distances. 13Ground-to-Satellite Quantum Teleportation (Nature)Experimental teleportation of a quantum state from the ground to a satellite, a step toward global quantum networks.

Learn the Protocols

4 entries

Interactive and educational material on BB84 and quantum security.

14IBM Quantum LearningFree courses on quantum computing, including cryptography-related topics. 15Qiskit Textbook – Quantum Key DistributionNotebooks on quantum algorithms and protocols, including QKD. 16Quantum CountryMnemonic-medium essays that teach quantum computing foundations. 17ID Quantique – Quantum-Safe SecurityVendor overview of quantum-safe security, QKD and QRNG.

Standards, Agencies & Institutes

9 entries

Official guidance and research bodies for quantum-safe security.

18NIST Post-Quantum CryptographyNIST's standardisation of quantum-resistant algorithms. 19UK NCSC – Quantum Security TechnologiesUK guidance on QKD and other quantum security technologies. 20ETSI – Quantum Key DistributionETSI work on QKD and quantum-safe standards. 21ENISAEU cybersecurity agency, which publishes guidance on post-quantum migration. 22National Quantum Initiative (US)US government programme coordinating quantum research and policy. 23National Quantum Mission (India)India's mission on quantum computing, communication and sensing. 24Centre for Applied Cryptographic Research (Waterloo)University of Waterloo research centre for applied cryptography. 25Indian Institute of ScienceLeading Indian research institute with quantum technology groups. 26IIT MadrasIndian institute with a quantum research centre.

Related Pages

3 entries

Related directories on this site.

27Post-Quantum Cryptography AlgorithmsAlgorithms for post-quantum security. 28Post-Quantum Cryptography for BlockchainHow quantum computing threatens blockchains and the standards responding. 29Number Theory for AIModular arithmetic, lattice and homomorphic cryptography, and AI for mathematics.

Frequently Asked Questions

What is quantum cryptography?

It uses quantum mechanics, such as superposition and the no-cloning theorem, to secure communication, most commonly through quantum key distribution (QKD) that reveals any eavesdropping.

How is it different from post-quantum cryptography?

Quantum cryptography relies on quantum physics and special hardware, while post-quantum cryptography uses new mathematical algorithms on ordinary computers that resist quantum attacks.

What is BB84?

BB84 is the first QKD protocol, proposed by Bennett and Brassard in 1984, which encodes bits in photon polarisation states so that interception disturbs them.

How far can quantum-secured links reach?

Fibre links work over hundreds of kilometres with repeaters or trusted nodes, and satellite experiments have distributed entangled photons over more than 1,000 km.

Is quantum cryptography unbreakable?

The protocols are secure in theory, but real devices have imperfections, so security depends on implementation, which is why standards and certification matter.