| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To properly conceal also data used for a statistical analysis of concealed data. <P>SOLUTION: An information processing method comprises: first processing of generating a first mask modified matrix by adding an original matrix and a first mask matrix having the same shape as the original matrix; second processing of generating a second mask modified matrix by adding a squared original matrix obtained by squaring each element of an original matrix and a second mask matrix having the same shape as the original matrix; and third processing of transmitting data about the first and second mask modified matrices to a second computer which stores data from computers of a plurality of users. The first mask matrix is so generated that first mask matrices used by the plurality of users are added to be a zero matrix, and the second mask matrix is so generated that second mask matrices used by the plurality of users are added to be a zero matrix. <P>COPYRIGHT: (C)2013,JPO&INPIT</p> |
