Archive for the ‘14 Quantum cryptic’ Category

14 Quantum Cryptic

Monday, June 28th, 2010

This continuing confusion about the nature of light, and the ambiguous nature of the compromise called ‘duality’ has permitted some interesting new proposals in the quantum field.

Quantum cryptography is based crucially upon the conclusion that a single emission can be detected only once, and that in that detection it is destroyed. This, in principle, enables a secure cryptographic key to be established, as we can base that key on the photons that avoid interception and are therefore entirely unknown to the eavesdropper. The potential problem for this nascent technology is that it depends on two conclusions, neither of them properly established. (more…)