Introduction to Quantum Cryptography

Details Introduction to Quantum Cryptography Introduction to Quantum Cryptography

2005-11-14

arxiv.org/abs/physics/0511120v1

Rev. Bras. Ens. Fis. 27, 517 (2005)

Physics

Physics Education

9 pages, 2 figures, text in Portuguese, to be published in Revista Brasileira de Ensino de Fisica

Scientific paper

We show in details the four quantum key distribution protocols which initiated the important field of quantum cryptography, using an accessible language for undergraduate students. We begin presenting the BB84 protocol, which uses polarization states of photons in order to transmit cryptographic keys. Thereupon we show the E91 protocol, whose security is based on the use of singlet states to generate a random sequence of bits. We end the paper with the BBM92 and the B92 protocol. These last two protocols can be seen as simplified versions of the first two.

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