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Quantum crypto reaches 150 km
From: Dave Farber <dave () farber net>
Date: Fri, 12 Mar 2004 14:14:54 -0500
Delivered-To: dfarber+ () ux13 sp cs cmu edu X-Comment: AT&T Maillennium special handling code - c X-Sender: (Unverified) Date: Fri, 12 Mar 2004 11:46:06 -0500 To: undisclosed-recipient:; From: Monty Solomon <monty () roscom com> Subject: Quantum crypto reaches 150 km Quantum crypto reaches 150 km 12 March 2004 A single photon is sent over a 150 km optical link beating the previous transmission record by 50 km. Scientists at NEC in Japan claim to have smashed the transmission distance record for quantum cryptography. The team says it successfully sent a single photon over a 150-km-long optical fiber link. This significantly extends the previous record of 100 km, which was announced in June 2003. Quantum cryptography uses a stream of single photons to transfer a secret key between a transmitter and a receiver. Each transmitted bit of the cryptographic key is encoded upon a single photon. Any attempt to intercept the key changes the quantum state of the photons, which reveals the presence of a hacker. ... http://optics.org/articles/news/10/3/11/1 ------------------------------------- You are subscribed as interesting-people () lists elistx com To manage your subscription, go to http://v2.listbox.com/member/?listname=ip Archives at: http://www.interesting-people.org/archives/interesting-people/
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- Quantum crypto reaches 150 km Dave Farber (Mar 12)