| 摘要 |
An information recording medium is provided with a recording information recording area ( 102 ) wherein recording information can be recorded, and an encrypting information recorded area (CDZ) wherein encrypting information (Key 1 ) for encrypting the recording information is previously recorded. The encrypting information recorded area includes a special area (CDZa) having a physical structure different from that of the recording information recording area at least on one part.
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