| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a method for obtaining aggregate statistics while protecting the privacy of data from client data stored in a server.SOLUTION: At first, first data and second data independent in one or more clients are sampled such that the sampled data are obtained. Thus, aggregate statistics related to private data can be securely obtained. In this case, a sampling parameter is substantially smaller than the length of the data. The sampled data are encrypted such that the encrypted data are obtained, and then the encrypted data are connected. The connected encrypted data are randomized such that the randomized data are obtained. In an authorized third person processor, the joint distribution of the first data and the second data is estimated such that the difference privacy requirements of the first data and the second data are satisfied from the randomized encrypted data.</p> |
