RECORDING MEDIUM, RECORDING AND REPRODUCING DEVICE, AND RECORDING AND REPRODUCING METHOD

摘要

PROBLEM TO BE SOLVED: To provide a recording medium which enables authentication. SOLUTION: A magnetic recording layer, which defines a magnetic recording area, is formed on the surface of a substrate of a magnetic recording medium, and a magnetic deficiency part, to which information can not magnetically be recorded, is formed in the magnetic recording area. COPYRIGHT: (C)2006,JPO&NCIPI