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Secure Communication with a Publicly Known Key

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Beige A., Englert B., Kurtsiefer C., Weinfurter H.

Acta Physica Polonica A

2002

vol. 101

issue 3

357-368

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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1 Acta Physica Polonica A

1 2002

1 Beige A.

1 Englert B.

1 Kurtsiefer C.

1 Weinfurter H.

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Secure Communication with a Publicly Known Key