The receiver Bob
This Bob receives photons through the yellow fiber-optic cable coming from Alice (or from Eve as has been the case in our eavesdropping experiment). The polarization of each received photon is analyzed in a compact unit (top) that contains four single-photon detectors. The timing of photon detection events is recorded by a timestamp unit (bottom).
Both units have been built at the Centre for quantum technologies, Singapore.
This picture from Full eavesdropping on quantum cryptography gallery and Quantum hacking lab gallery is included in Picture Collection (ref. nr. a295-5) on Photo Pages.
Taken on July 5, 2009 at the National University of Singapore.
Fujichrome Sensia 100 film, Canon
How you can use this image. ©2009 Vadim Makarov