Dave Coplin, Director of Search, Bing, spoke about how big data is transforming how businesses are making decisions, the way it is being used for the popular Kinect, as well as the privacy issues.
29. DIFFERENTIAL PRIVACY
“A randomized function K gives –differential
privacy if for all data sets D1 and D2 differing
on at most one element, and all S ⊆ Range(K),
where the probability space in each case is
over the coin flips of the mechanism K.”
Source: http://research.microsoft.com/en-us/projects/databaseprivacy/dwork.pdf