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Barry Wellman Professor of Sociology NetLab Director
wellman at chass.utoronto.ca http://www.chass.utoronto.ca/~wellman
Centre for Urban & Community Studies University of Toronto
455 Spadina Avenue Toronto Canada M5S 2G8 fax:+1-416-978-7162
To network is to live; to live is to network
---------- Forwarded message ----------
Date: Fri, 29 Jul 2005 00:04:43 +0100
From: MAPPING-CYBERSPACE automatic digest system <[log in to unmask]>
On 24-Jul-05, at 1:33 PM, martin dodge wrote:
> Hello, despite the 'borderless world' rhetoric I have often been
> interested in measurement of info flows between territories.
> I just came across this paper and I thought it might be interesting to
> the list, particularly so with recent discussion on the risks in
> cross-border data flows for security, id theft, outsourcing in
> corporate/govt sector, etc.
> Quantifying National Information Leakage
> Daniel Wendlandt, Martin Casado
> The Internet has been become a global communication
> medium that transcends national boundaries. However, few
> empirical studies have explored how this network without borders
> impacts a nation.s ability to limit access and control over the
> information it entrusts to the Internet. In this paper we present our
> work addressing one facet of this issue: national information leakage.
> We explore to what degree information is routed outside of a
> country during communications between two internal networks.
> Our technique uses trace measurements from multiple vantage
> points within a nation to a diverse set of destinations within that
> same country. The traces are then mapped to physical locations
> using various IP-to-geographic location techniques to determine
> what percentage of point-to-point communication routes within a
> target country temporarily leave during transit to the final
> We present measurements of sources within the United
> States, Mexico, Germany, Canada and Denmark.
> martin dodge
> cyber geography research
> centre for advanced spatial analysis, university college london
> gower street, london, wc1e 6bt, united kingdom
> email: [log in to unmask] (remove the nospam bit)
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