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Perhaps the most central and unique feature of the PEP system is that different users receive different row identifiers to refer to the same row. This prevents downloaders from blending their respective data into a single, larger data set. Thus, with its built-in pseudonymization mechanism, PEP provides some basic privacy safeguards when disseminating sensitive data such as medical or financial information.
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Traditional data IDs
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# Traditional data IDs
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Data storage systems usually assign unique identifiers to the entries they store. For example, (relational) database tables typically include an `Id` column:
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