 The project also created and fielded the world's first superconducting nanowire single-photon detector.It was sponsored by DARPA as part of the QuIST program, and built and operated by BBN Technologies in close collaboration with colleagues at Harvard University and the Boston University Photonics Center.The DARPA Quantum Network was fully compatible with standard Internet technology, and could provide QKD-derived key material to create Virtual Private Networks, to support IPsec or other authentication, or for any other purpose.