페이스북과 트위터 한국인 이용자 계정 934만개를 조사하여 개인정보 노출 현황을 분석해보니 다양한 개인정보가많이 노출되어 있었다. 이메일, 전화번호 같은 식별정보는 1% 미만으로 많이 노출되어 있지 않았지만, 이름, 학교같은 비식별 정보를 통해 개인을 특정할 수 있는 경우가 많았는데, 이름이 유일하여 개인을 특정할 수 있는 계정이 35만개에 달했으며, 2개 이상의 정보를 조합하여 개인을 특정할 수 있는 경우는 297만 명에 달했다. 또한, 동일인이 소유한 페이스북과 트위터 계정의 연결 가능성을 분석하였는데, 동일인일 가능성이 있는 계정 쌍 34만개를 찾을 수 있었다. 계정을 연결할 수 있다는 것은 개인을 식별하고 특정했음을 의미한다. 비식별정보를 통한 특정 가능성과 연결가능성을 통해 식별정보만을 필터링하는 기존 개인정보보호방안에 한계가 있음을 알 수 있다.
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