Authentication system and method
An authentication system using an information encoding article that includes an information code, the authentication system includes a detection unit capable of reading the information code, an information acquisition unit configured to acquire first information regarding a concentration distribution in an encoding region before and after the application of an external stimulus, and an authentication unit configured to execute authentication by using at least both second information acquired prior to the first information and regarding the concentration distribution in the encoding region and the first information, wherein the information encoding article having the encoding region where the information code is formed, the concentration distribution in the encoding region, to be read by the detection unit, changing upon application of the external stimulus to the encoding region.
1 . An authentication system using an information encoding article that includes an information code, the authentication system comprising:
an optical change detection device capable of reading the information code;
at least one memory storing a program; and
at least one processor that executes the stored program, which causes the at least one processor to:
acquire first information regarding a change in a concentration distribution in an encoding region due to application of an external stimulus; and
execute authentication by using at least both second information acquired prior to the first information and regarding the concentration distribution in the encoding region and the first information,
wherein the information encoding article having the encoding region where the information code is formed, the concentration distribution in the encoding region, to be read by the optical change detection device, changing upon application of the external stimulus to the encoding region.
2 . The authentication system according to claim 1 , wherein the at least one processor further executes the authentication based on a degree of correlation between the first information and the second information.
3 . The authentication system according to claim 1 , wherein the first information and the second information are each a time-dependent change in the concentration distribution in the encoding region.
4 . The authentication system according to claim 1 , wherein the first information and the second information are each information regarding a spatial concentration distribution in the encoding region.
5 . The authentication system according to claim 1 , wherein the external stimulus is application of a disinfectant.