Physics:Quantum BB84: Difference between revisions
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|image=[[File:Quantum_BB84_educational_yellow.png|430px|BB84 quantum key distribution: basis choices, photon transmission, and eavesdropping checks.]] | |image=[[File:Quantum_BB84_educational_yellow.png|430px|BB84 quantum key distribution: basis choices, photon transmission, and eavesdropping checks.]] | ||
|text= | |text=BB84 is a Book I topic in the Quantum Collection. It is a quantum key distribution protocol proposed by Charles Bennett and Gilles Brassard in 1984. The protocol uses nonorthogonal quantum states, often photon polarizations, to let two parties establish a shared secret key while detecting possible eavesdropping. Its security comes from the fact that unknown quantum states cannot be measured without disturbance when the measurement basis is not known. BB84 connects the uncertainty principle, no-cloning, measurement, authentication, and classical error correction in one of the central examples of quantum cryptography. | ||
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== Overview == | == Overview == | ||
Latest revision as of 22:58, 23 May 2026
BB84 is a Book I topic in the Quantum Collection. It is a quantum key distribution protocol proposed by Charles Bennett and Gilles Brassard in 1984. The protocol uses nonorthogonal quantum states, often photon polarizations, to let two parties establish a shared secret key while detecting possible eavesdropping. Its security comes from the fact that unknown quantum states cannot be measured without disturbance when the measurement basis is not known. BB84 connects the uncertainty principle, no-cloning, measurement, authentication, and classical error correction in one of the central examples of quantum cryptography.
Overview
Placeholder: explain how Alice and Bob use non-orthogonal polarization or spin bases to establish a shared secret key and detect eavesdropping.
Key ideas
Placeholder: cover basis choice, quantum measurement disturbance, sifted keys, error checking, privacy amplification.
Protocol idea
Placeholder: develop this section with definitions, examples, formulas, and links to related Quantum Collection pages.
Quantum states and bases
Placeholder: develop this section with definitions, examples, formulas, and links to related Quantum Collection pages.
Eavesdropping and error rates
Placeholder: develop this section with definitions, examples, formulas, and links to related Quantum Collection pages.
Security role in quantum information
Placeholder: develop this section with definitions, examples, formulas, and links to related Quantum Collection pages.
See also
Table of contents (217 articles)
Index
Full contents
References
Source attribution: Physics:Quantum BB84
