An anonymous reader writes: South Korea's Resident Registration Number (RRN) has been proven 'vulnerable to almost any adversary' by the 'Queen of re-identification', Harvard Professor Latanya Sweeney, who previously proved that 87 percent of all Americans could be uniquely identified using just their ZIP code, birthdate, and sex. Sweeney was able to decrypt personal information from the RRN numbers of 23,163 deceased Koreans with 100% success by two different methods of attack, and notes that the South Korean system is based on one currently in use in the U.S.
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