| 摘要 |
PROBLEM TO BE SOLVED: To easily prevent the illegality such as forgery and alteration while providing the inexpensive system than heretofore. SOLUTION: On the magnetic card furnished with a magnetic stripe 1a wherein the specific value information is stored and held, the magnetic stripe 1a is provided with 1st, 2nd and 3rd tracks arranged in parallel each other. On the 1st track A, the signal regarding the above value information is recorded, and a signal with specified recording density is recorded on the 2nd track B, and a jitter generated at the time of writing the signal recorded on the 1st track A is coded and recorded on the 3rd track C.
|
