A lot of privacy protection technologies have been proposed, but most of them are independent and aimat protecting some specific\nprivacy. There is hardly enough deep study into the attributes of privacy. To minimize the damage and influence of the privacy\ndisclosure, the important and sensitive privacy should be a priori preserved if all privacy pieces cannot be preserved. This paper\nfocuses on studying the attributes of the privacy and proposes privacy information security classification (PISC) model.The privacy\nis classified into four security classifications by PISC, and each classification has its security goal, respectively. Google search engine\nis taken as the research platform to collect the related data for study. Based on the data from the search engine, we got the security\nclassifications of 53 pieces of privacy.
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