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Lec09b - COMP7370 Advanced Computer and Network Security...

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1 COMP7370 Advanced Computer and Network Security Generalizing Data to Provide Anonymity when Disclosing Information (1) Topics: 1. Problem description a. How to formally define a problem? Topic 1: Problem Description Motivation: o Protect individual-specific (private) data - e.g., name, address, phone number, SSN o Solution 1: no release of data o Question 1: Limitations – usage, business and research need shared info. - Story: IRB - INSTITUTIONAL REVIEW BOARD for RESEARCH INVOLVING HUMAN SUBJECTS o Solution 2: remove/encrypt private data -> anonymous info. o Limitation: (see slide09b, p2) - Re-identifying anonymous data - Link to outside data (public data) - e.g., voting list - use DOB (12%); DOB+gender (29%); DOB+Zip (69%) Private data Other data Remove or Encrypt Private Data Private data Other data Release Data DB: Private data Other data Remove or Encrypt 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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