Authenticity determination method, apparatus and program

An authenticity determination apparatus for determination of the authenticity of solid objects having a random and readable intrinsic characteristic distributed on the surface thereof, comprising:

• an acquiring unit for acquiring reference data expressing the characteristic distributed on a genuine solid object obtained by reading in advance the characteristic of the genuine solid object;
• a reading unit for deriving cross-checking data expressing the characteristic distributed on the solid object to be determined for authenticity by reading the characteristic of the solid object to be determined for authenticity;
• a calculating unit for calculating, on the basis of the reference data and the cross-checking data, correlation values of data expressing the characteristic distributed in a first region of specified size on either the genuine solid object or the solid object to be determined for authenticity, with data expressing the characteristic distributed in a second region of the same size as the first region on the other solid object, and repeating this operation when the position of the second region on other solid matter is moved within a region larger than the specified size;
• and
• a determination unit for determination of the authenticity of the solid object to be determined on the basis of the maximum value of plural correlation values obtained by the calculations, and a characteristic quantity that expresses the shape of the distribution of correlation values derived from the plural correlation values.

A computer readable storage medium having a computer-executable program embedded thereon, the program including computer executable instructions to be executed by a computer comprising a reading device for reading a random and intrinsic characteristic of a solid object distributed along the surface of the solid object, the program, when executed by the computer, causing the computer to execute:

• an acquiring command for acquiring reference data expressing the characteristic distributed on a genuine solid object obtained by reading in advance the characteristic of the genuine solid object;
• a reading control command for deriving cross-checking data expressing the characteristic distributed on the solid object to be determined for authenticity by reading the characteristic of the solid object to be determined for authenticity;
• a calculating command for calculating, on the basis of the reference data and the cross-checking data, correlation values of data expressing the characteristic distributed in a first region of specified size on either the genuine solid object or the solid object to be determined for authenticity, and data expressing the characteristic distributed in a second region of the same size as the first region on the other solid object, and repeating this operation when the position of the second region on the other solid object is moved within a region larger than the specified size;
• and
• a determination command for determining the authenticity of the solid object to be determined on the basis of the maximum value of plural correlation values obtained by the calculation, and a characteristic quantity that expresses the shape of distribution of correlation values derived from the plural correlation values.