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Complexity
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2017
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Article
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Tab 2
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Research Article
Efficient Privacy-Preserving Protocol for
k
-NN Search over Encrypted Data in Location-Based Service
Table 2
Comparison of communication cost.
Scheme
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PCQP
LPCQP
EPCQP
n
and
denote the number of all entries in the POI-table and a subtable, respectively.