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Symmetric collective attacks for the eavesdropping of symmetric quantum key distribution
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| Journal | INTERNATIONAL JOURNAL OF QUANTUM INFORMATION |
|---|---|
| Date | Published - Jul 2008 |
| Issue number | SUPL. |
| Volume | 6 |
| Number of pages | 7 |
| Pages (from-to) | 765-771 |
| Original language | English |
Abstract
We consider the collective eavesdropping of the BB84 and six-state protocols. Since these protocols are symmetric in the eigenstates of conjugate bases, we consider collective attacks having the same kind of symmetry. We then show how these symmetric collective attacks are sufficiently strong in order to minimize the Devetak-Winter rates. In fact, it is quite easy to construct simple examples able to reach the unconditionally secure key rates of these protocols.
- quantum cryptography, unconditional security, collective attacks, CRYPTOGRAPHY, STATES
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