On 02/06/2017 08:46 AM, Georgi Guninski wrote:

On Sun, Feb 05, 2017 at 06:35:21PM -0800, Razer wrote:

More information: High-dimensional quantum cloning and applications to
quantum hacking, Science Advances  03 Feb 2017, DOI:
10.1126/sciadv.1601915

Provided by University of Ottawa

https://phys.org/news/2017-02-quantum-networks-hacking-threats.html

http://advances.sciencemag.org/content/3/2/e1601915
|In addition, a cloning attack on a Bennett and Brassard (BB84)
|quantum key distribution protocol is experimentally demonstrated
|to reveal the robustness of high-dimensional states in quantum
|cryptography.


I can't parse the technical stuff. Does the last paragraph mean
they broke "old quantum crypto"?

From the abstract and the last paragraph of the article what I'm seeing is they can detect a hack on the data (apparently even if it's simply a regurgitation of the original) because the 'noise' created by the tampering itself appears to leave a 'standard recognizable signature'. But pardon if that's not the answer to the question you asked... as the Sj: line implies this is way above my pay-grade.

Rr