Information recording processing apparatus, information reproduction processing apparatus, information recording medium, information recording processing method, information reproduction processing method, and computer program

An information recording processing apparatus for executing a data recording process, the information recording processing apparatus comprising:

• a seed generation section configured to:
• (a) receive an error detection code corresponding to recording object data, the received error detection code representing any error added to the recording object data;
• and
• (b) generate a seed based on said received error detection code;
• a random number generation section configured to generate a plurality of random numbers based on the generated seed, wherein at least one of the random numbers is generated using the generated seed as an initial value thereof;
• a bit position conversion section configured to:
• (a) receive scrambled cryptographic key data corresponding to a cryptographic key for the recording object data;
• and
• (b) execute a bit position conversion process, wherein a first plurality of the random numbers generated by the random number generation section are applied to the scrambled cryptographic key data to obtain bit position conversion data;
• and
• a recording processing section configured to execute a recording process of a cryptographic key data recording signal, wherein the cryptographic key data recording signal is generated based on the bit position conversion data obtained by the bit position conversion process.

An information reproduction processing apparatus for executing a reproduction process of data recorded as encrypted data on an information recording medium, the information reproduction processing apparatus comprising:

• a seed generation section configured to:
• (a) receive an error detection code corresponding to reproduction object data, the received error detection code representing any error added to the reproduction object data;
• and
• (b) generate a seed based on said received error detection code;
• a random number generation section configured to generate a plurality of random numbers based on the generated seed, wherein at least one of the random numbers is generated using the generated seed as an initial value thereof;
• a descramble processing section configured to:
• (a) read cryptographic key data from an information recording medium, the cryptographic key data corresponding to a cryptographic key for the reproduction object data;
• and
• (b) execute a descrambling process for the cryptographic key data read from the information recording medium, wherein a first plurality of the random numbers generated by the random number generation section are applied to the cryptographic key data to obtain descrambled cryptographic key data;
• and
• a decryption processing section configured to execute a decryption process of the reproduction object data with the cryptographic key generated based on the descrambled cryptographic key data obtained by the descrambling process.

An information reproduction processing apparatus for executing a reproduction process of data recorded as encrypted data on an information recording medium, the information reproduction processing apparatus comprising:

• a seed generation section configured to:
• (a) receive an error detection code corresponding to reproduction object data, the received error detection code representing any error added to the reproduction object data;
• and
• (b) generate a seed based on said received error detection code;
• a random number generation section configured to generate a plurality of random numbers based on the generated seed, wherein at least one of the random numbers is generated using the generated seed as an initial value thereof;
• a bit position conversion section configured to:
• (a) read cryptographic key data from an information recording medium, the cryptographic key data corresponding to a cryptographic key for the reproduction object data;
• and
• (b) execute a bit position conversion process, wherein a first plurality of the random numbers generated by the random number generation section are applied to the cryptographic key data to obtain bit position conversion;
• and
• a decryption processing section configured to execute a decryption process of the reproduction object data with the cryptographic key generated based on the bit position conversion data obtained by the bit position conversion process.

An information recording processing method for executing a data recording process, the information recording processing method comprising:

• causing a seed generation section to receive an error detection code corresponding to recording object data, the received error detection code representing any error added to the recording object data;
• causing the seed generation section to generate a seed based on said received error detection code;
• causing a random number generation section to generate a plurality of random numbers based on the generated seed, wherein at least one of the random numbers is generated using the generated seed as an initial value thereof;
• causing a scramble processing section to obtain scrambled data by:
• (a) executing a scrambling process for cryptographic key data corresponding to a cryptographic key for the recording object data;
• and (b) applying a first plurality of the random numbers to the cryptographic key data;
• and
• causing a recording processing section to execute a recording process of a cryptographic key data recording signal, wherein the cryptographic key data recording signal is generated based on the obtained scrambled data.

An information recording processing method for executing a data recording process, the information recording processing method comprising:

• causing a seed generation section to receive an error detection code corresponding to recording object data, the received error detection code representing any error added to the recording object data;
• causing the seed generation section to generate a seed based on said received error detection code;
• causing a random number generation section to generate a plurality of random numbers based on the generated seed, wherein at least one of the random numbers is generated using the generated seed as an initial value thereof;
• causing a bit position conversion section to obtain bit position conversion data by:
• (a) receiving scrambled cryptographic key data corresponding to a cryptographic key for the recording object data;
• and (b) applying a first plurality of the random numbers generated by the random number generation section to the scrambled cryptographic key data;
• and
• causing a recording processing section to execute a recording process of a cryptographic key data recording signal, wherein the cryptographic key data recording signal is generated based on the bit position conversion data obtained by the bit position conversion section.

An information reproduction processing method for executing a reproduction process of data recorded as encrypted data on an information recording medium, the information reproduction processing method comprising:

• causing a seed generation section to receive an error detection code corresponding to reproduction object data, the received error detection code representing any error added to the reproduction object data;
• causing the seed generation section to generate a seed based on said received error detection code;
• causing a random number generation section to generate a plurality of random numbers based on the generated seed, wherein at least one of the random numbers is generated using the generated seed as an initial value thereof;
• causing a descramble processing section to obtain descrambled cryptographic key data by:
• (a) reading cryptographic key data from an information recording medium, the cryptographic key data corresponding to a cryptographic key for the reproduction object data;
• and (b) applying a first plurality of the random numbers generated by the random number generation section to the cryptographic key data;
• and
• causing a decryption processing section to execute a decryption process of the reproduction object data with the cryptographic key generated based on the descrambled cryptographic key data obtained by the descramble processing section.

An information reproduction processing method for executing a reproduction process of data recorded as encrypted data on an information recording medium, the information reproduction processing method comprising:

• causing a seed generation section to receive an error detection code corresponding to reproduction object data, the received error detection code representing any error added to the reproduction object data;
• causing the seed generation section to generate a seed based on the received error detection code;
• causing a random number generation section to generate a plurality of random numbers based on the generated seed, wherein at least one of the random numbers is generated using the generated seed as an initial value thereof;
• causing a bit position conversion section to obtain bit position conversion data by:
• (a) reading cryptographic key data from an information recording medium, the cryptographic key data corresponding to a cryptographic key for the reproduction object data;
• and (b) applying a first plurality of the random numbers generated by the random number generation section to the cryptographic key data;
• and
• causing a decryption processing section to execute a decryption process of the reproduction object data with the cryptographic key generated based on the bit position conversion data obtained by the bit position conversion section.

A non-transitory computer readable medium storing a computer program for executing a data recording process, said computer program structured to cause an apparatus to:

• receive an error detection code corresponding to recording object data, the received error detection code representing any error added to the recording object data;
• generate a seed based on said received error detection code;
• generate a plurality of random numbers based on the generated seed, wherein at least one of the random numbers is generated using the generated seed as an initial value thereof;
• execute a scrambling process for cryptographic key data corresponding to a cryptographic key for the recording object data, wherein the generated random numbers are applied to the cryptographic key to obtain scrambled cryptographic key data;
• and
• execute a recording process of a cryptographic key data recording signal generated based on the scrambled cryptographic key data.

A non-transitory computer readable medium storing a computer program for executing a reproduction process of data recorded as encrypted data on an information recording medium, said computer program structured to cause an apparatus to:

• receive an error detection code corresponding to reproduction object data, the received error detection code representing any error added to the reproduction object data;
• generate a seed based on the received error detection code;
• generate a plurality of random numbers based on the generated seed, wherein at least one of the random numbers is generated using the generated seed as an initial value thereof;
• execute a descrambling process for cryptographic key data read from the information recording medium and corresponding to a cryptographic key for the reproduction object data, wherein the generated random numbers are applied to the cryptographic key to obtain descrambled cryptographic key data;
• and
• execute a decryption process of the reproduction object data with the cryptographic key generated based on the descrambled cryptographic key data.