Retention-replacement probability generation device, retention-replacement perturbation device, retention-replacement probability generation method, retention-replacement perturbation method, and program
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United States of America
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Mar 4, 2025
Grant Date -
Dec 1, 2022
app pub date -
Oct 11, 2019
filing date -
Oct 11, 2019
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Abstract
Provided is a retention-replacement probability generation device that is capable of generating retention-replacement probability that realizes retention-replacement perturbation of a suitable level. Included are: a global optimal solution determining unit that, outputs a global optimal solution in a case where a global optimal solution exists that is a replacement probability of the attribute values in which the transition matrix P and histogram vector expression v of the attribute values yield ∥Pv−v∥=0; a region generating unit that, in a case where the global optimal solution does not exist, generates a region that is defined by an inequality equivalent to conditions for both replacement probabilities corresponding to i'th and j'th attribute values satisfying ε-differential privacy, and an inequality equivalent to conditions for the replacement probability of one and the retention probability of the other corresponding to the i'th and the j'th attribute values satisfying ε-differential privacy.
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