Quantum Cryptography and Algorithmic Security
Summary
Quantum cryptography leverages the principles of quantum mechanics to achieve information-theoretic security, most notably through techniques such as quantum key distribution and quantum-safe symmetric encryption. At the same time, algorithmic security examines the resilience of cryptographic schemes against both classical and quantum attacks, focusing on the design and analysis of algorithms that remain secure in the presence of powerful quantum adversaries. Together, these fields address the twin challenges of exploiting quantum resources for enhanced security and defending existing protocols against emerging quantum algorithms. Practical implementations now span experimental quantum networks, quantum circuits for symmetric and asymmetric primitives, and resource‐aware algorithmic optimisations. Global efforts concentrate on integrating quantum-secure methods into current infrastructures, from financial systems to energy grids. Progress in this area promises not only to protect data confidentiality and integrity against future quantum threats but also to unlock new modes of secure communication, underpinning the evolution of the quantum internet and next-generation secure computing platforms.
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Quantum Cryptography and Algorithmic Security publication trend
The graph below shows the total number of articles in quantum cryptography and algorithmic security across all publications each year (not limited to Nature Index journals).
Technical terms
Quantum Key Distribution (QKD): A method for sharing secret keys using quantum states, whose measurement disturbances reveal eavesdropping.
Post-Quantum Cryptography (PQC): Classical cryptographic algorithms designed to resist attacks by quantum computers, often based on lattice, code or multivariate hardness.
Quantum Permutation Pad (QPP): A symmetric encryption technique applying quantum permutation matrices to quantum states for information-theoretic privacy.
CNOT Gate: A two-qubit controlled-NOT quantum logic gate fundamental to entanglement and algorithm implementation in quantum circuits.
Shor’s Algorithm: A quantum algorithm that factors large integers and computes discrete logarithms efficiently, posing threats to public-key cryptosystems.
References
- Quantum encryption of superposition states with quantum permutation pad in IBM quantum computers. EPJ Quantum Technology (2023).
- Minimizing CNOT-count in quantum circuit of the extended Shor’s algorithm for ECDLP. Cybersecurity (2023).
- Toward Quantum Secured Distributed Energy Resources: Adoption of Post-Quantum Cryptography (PQC) and Quantum Key Distribution (QKD). Energies (2022).
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