| 摘要 |
PROBLEM TO BE SOLVED: To effectively prevent the forgery and the duplication of an object by confirming the legality of identification data only by autographic data generated based on reference data obtained by a prescribed machine from a reference area difficult to produce the same thing. SOLUTION: With respect to identification data M' among data W' with autograph obtained from a magnetic stripe 3, hashing processing is executed to obtain hashed data D'. Autographic data S' among data W' with autograph is simultaneously inverse-transformed by a multivariable polynomial tuple Q to separate them into hashed data D" and random data R' each. Two hashed data D' and D" obtained like this are compared with each other to inspect the autograph to check the presence/absence of the alteration, etc., of data. At the same time of this, identification data M' is separated into reference data F' and managing data A' to compare identification data F' with reference data F" obtained from a reference area to check the presence/absence of the alteration, etc., of data. |
