Two Ph.D. students and their professors have developed an open-source system for tracking the location of a lost or stolen laptop that does not rely on a proprietary, central tracking service--providing some competition for commercial software developers. One leading commercial developer, however, says the open-source version lacks a number of essential features and, therefore, is less effective in deterring laptop thefts and recovering laptops that do go missing.

The open-source developers of Adeona are Ph.D. students Gabriel Maganis from the University of Washington (UW) and Thomas Ristenpart from the University of California, San Diego, and UW professors Tadayoshi Kohno and Arvind Krishnamurthy. They


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