Patent ID: 7058977

Claim:
A data storing medium, comprising: a digital data area in which one of encrypted digital data and non encrypted digital data is written; a control data area in which control data necessary for reproducing recorded digital data is written; and a plurality of copyright control information areas in which is written the same copyright control information necessary for decrypting the encrypted digital data, wherein said plurality of copyright control information areas are spaced apart by a predetermined interval, wherein said plurality of copyright control information areas are embossed so as to be write prohibited, wherein said control data area is write permitted, wherein, data written to the area for the copyright control information is converted so that the data is not corrected by an error correcting process performed when the encrypted digital data is reproduced, and wherein a data converting process converting the copyright control information is a process that satisfies a relation of 2a+b>d where “a” is a number of lines that are not erased as an error of the copyright control information, “b” is a number of lines that are erased thereof, and “d” is a minimum distance of the error correction code.