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Privacy Preserving Data Mining(PPDM) is an ongoing research area aimed at bridging the gap between
the collaborative data mining and data confidentiality There are many different approaches which have
been adopted for PPDM, of them the rule hiding approach is used in this article. This approach ensures
output privacy that prevent the mined patterns(itemsets) from malicious inference problems. An efficient
algorithm named as Patternbased Maxcover Algorithm is proposed with experimental results. This
algorithm minimizes the dissimilarity between the source and the released database; Moreover the
patterns protected cannot be retrieved from the released database by an adversary or counterpart even
with an arbitrarily low support threshold.
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