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Noisy Light Is New Key To Encryption
The research team, led by Northwestern professors Prem Kumar and Horace Yuen, used standard lasers and existing optical technology to transmit a large bundle of photons, the particles that make up light.
Current techniques in quantum cryptography are based on shooting single photons. But detecting single photons is much harder, scientists noted, and requires equipment that is so sensitive it often registers nonexistent photons. Northwestern's quantum cryptography method required less-sensitive detectors.