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We investigate the inference problems due to functional dependencies (FD) and multi-valued dependencies (hND) in a multilevel relational database (MDB) with attribute and record classification schemes, respectively. For FDs, we show that, to prevent compromise, the security levels of attributes must be assigned by using the knowledge of functional dependencies. Under the assumption that all the attributes...
A statistical database (SDB) is a database that is used to provide simple summary statistics (e.g., SUM, COUNT, MAX, MEDIAN, etc.) about populations stored in the database and that supports statistical data analysis. When SDB users infer protected information in the SDB from responses to queries, we say that the SDB is compromised. The security problem of SDB is to allow simple summary statistics...
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