See http://sciencebusiness.technewslit.com/?p=10795 for full story.
Short version, they use some type of statistical sampling (I believe) to locate probable source of events, this can be used for tracking source of Malware, Spam, Rumors, Epidemics, etc.
While a very useful tool, this also has clear implications for freedoms, it could make SOPA look like nothing, and it is frightening to consider what a truly repressive government could do with such a tool.
Excerpt (?) of Paper, authored by Pedro C. Pinto, Patrick Thiran, and Martin Vetterli, can be seen at (PDF) http://www.pedropinto.org.s3.amazonaws.com/publications/locating_source_diffusion_networks.pdf
Full paper, behind paywall, at Phys. Rev. Lett. 109, 068702 (2012) [5 pages]Locating the Source of Diffusion in Large-Scale Networks
DOI:
10.1103/PhysRevLett.109.068702
PACS:
89.75.Hc, 89.20.Hh, 89.75.Da
According to PDF link:
- "This work was supported by the ERC Advanced Grant – Support for Frontier Research – SPARSAM Nr: 247006."
- "[16] See Supplemental Material at [URL will be inserted by pub- lisher] for additional details on proofs, accuracy of approxi- mations, complexity, and parameters of the case study."
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