Patent ID: 7761707

Claim:
A non-transitory recording medium having stored thereon instructions for providing: on a content player comprising readout means for reading a portion of decryption information for decryption of encrypted content, a remainder of said decryption information, and encrypted content in this said management order, out of a non-transitory medium having two areas of different security levels in which the encrypted content that has been encrypted through a predetermined technique and the decryption information for the decryption of the encrypted content are recorded, said encrypted content is decrypted and played by using the decryption information through the content player characterized in that: a portion of said decryption information is recorded in a first area having a predetermined security level; the remainder of said decryption information that has been encrypted through said predetermined technique and said encrypted content are recorded in a second area having a lower security level than the security level of the first area; and said portion of said decryption information recorded in said first area includes information indicating the presence or absence of said remainder of said decryption information, information indicating the location at which said remainder is recorded, information indicating the data size of said remainder, and information for the decryption of said remainder, said remainder of said decryption information is read out from the location according to the information indicating the location at which the remainder included in the portion of the decryption information is recorded, after the portion of the decryption information has been read out; wherein signal processing means included in the content player is adapted to decrypt said encrypted content according to said decryption information that has been read out by said readout means; and control means comprised within the content player is adapted to determine the location from which said readout means reads said decryption information or said encrypted content out of said medium and to direct said readout means to read out from said location, said instructions allow: said signal processing means to detect the location where said remainder of said decryption information is recorded from said portion of decryption information and notify said control means of it, and to decrypt said remainder of said decryption information with said portion of said decryption information when said remainder of said decryption information is read out by said readout means, and said control means to direct said readout means to read said remainder from the location where said remainder is recorded, which has been notified from said signal processing means.