Forwarded from: Nikolay Sturm <sturmat_private-darmstadt.de> * InfoSec News [2002-11-04]: > With the system, keys to the code are transmitted as a stream of > photons, sent over a fiber optic cable. Because of the properties of > quantum physics, the mere act of observing the transmission would > alter the photons, rendering their information useless to any > eavesdroppers. This is not true in general, only when single photons are used for communication. In reality people use weak laser pulses, which have a certain degree of pulses with two or more photons. These permit attacks. > carefully controlled. But outside researchers say that quantum > cryptography does make possible electronic conversations that would > be immune to eavesdropping. Not really, often enough you can eavesdrop other channels like the keyboard or monitor or whatever. > Research in quantum cryptography goes back into the 1980's. But > MagiQ (pronounced as magic) and a Swiss competitor, ID Quantique, > are the first to attempt to develop commercial systems based on the > technology. ID Quantique's system has not yet reached the market. This is plain wrong. ID Quantique sells their system for over 6 month now. At the last Cebit in Hannover, Germany, they sold it for 100 000 Euro, AFAIR. bye, Nikolay -- OpenPGP: 0x5C0878D2 - BB55 EDCF A1F6 8057 B953 4C66 EFBD BA73 5C08 78D2 - ISN is currently hosted by Attrition.org To unsubscribe email majordomoat_private with 'unsubscribe isn' in the BODY of the mail.
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