Secure communication with a publicly known key

Details Secure communication with a publicly known key Secure communication with a publicly known key

2001-11-20

arxiv.org/abs/quant-ph/0111106v2

Acta Phys. Pol. A 101, 357 (2002)

Physics

Quantum Physics

14 pages including 2 figures, erratum added

Scientific paper

We present a scheme for direct and confidential communication between Alice and Bob, where there is no need for establishing a shared secret key first, and where the key used by Alice even will become known publicly. The communication is based on the exchange of single photons and each and every photon transmits one bit of Alice's message without revealing any information to a potential eavesdropper.

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