Abstract:
:Quantum key distribution (QKD) allows two remote parties to grow a shared secret key. Its security is founded on the principles of quantum mechanics, but in reality it significantly relies on the physical implementation. Technological imperfections of QKD systems have been previously explored, but no attack on an established QKD connection has been realized so far. Here we show the first full-field implementation of a complete attack on a running QKD connection. An installed eavesdropper obtains the entire 'secret' key, while none of the parameters monitored by the legitimate parties indicate a security breach. This confirms that non-idealities in physical implementations of QKD can be fully practically exploitable, and must be given increased scrutiny if quantum cryptography is to become highly secure.
journal_name
Nat Communjournal_title
Nature communicationsauthors
Gerhardt I,Liu Q,Lamas-Linares A,Skaar J,Kurtsiefer C,Makarov Vdoi
10.1038/ncomms1348subject
Has Abstractpub_date
2011-06-14 00:00:00pages
349issn
2041-1723pii
ncomms1348journal_volume
2pub_type
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