MagiQ Technologies Inc., which is based in New York, has formed a joint venture to commercialize diamond-encrusted single-photon sources for use as components of quantum cryptography systems. Also participating in the agreement are Silicon Graphics Inc. of Mountain View, Calif., and, in Australia, Qucor Pty Ltd. of Sydney and the University of Melbourne. Funded in part by a $2.5 million Australian government award from Quantum Communications Victoria — Industry Development Initiative, the group will develop and commercialize devices that can generate and use single photons for the storage and transmission of huge quantities of encrypted information.