Lec11a - • Link to outside data 4 Formal Definitions 5...

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1 Dr. Xiao Qin Auburn University http://www.eng.auburn.edu/~xqin [email protected] Spring, 2011 COMP 7370 Advanced Computer and Network Security Generalizing Data to Provide Anonymity when Disclosing Information
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2 Review Re-identifying anonymous data Link to outside data DB: Private data Other data Remove Private Data DB_release: Private data Other data Re-identify: Linking DB_outside: Private-data’ Other-data’ Private-data’+ Other data Quasi- identifier
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3 Review Re-identifying anonymous data
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Unformatted text preview: • Link to outside data 4 Formal Definitions 5 K-anonymity If each quasi-identifier in the released data satisfies k-anonymity , then the combination of released data to external sources cannot match lower than k individuals. 6 Achieving K-anonymity • change unusual information to typical values, • insert complementary records • swapping entries • scrambling records 7 Example 8 Example 9 Example...
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