Information recording processing apparatus, information reproduction processiing 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, comprising:

• a seed generation section for generating a seed based on an error detection code set corresponding to recording object data;
• a random number generation section for generating random numbers based on the seed generated by the seed generation section;
• a bit position conversion section for executing a bit position conversion process, in which random numbers generated by the random number generation section are applied, for cryptographic key data set as a cryptographic key for the recording object data, and
• a recording processing section for executing a recording process of a cryptographic key data recording signal generated based on the 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, comprising:

• a seed generation section for generating a seed based on an error detection code set corresponding to reproduction object data;
• a random number generation section for generating random numbers based on the seed generated by the seed generation section;
• a descramble processing section for executing a descrambling process, in which the random numbers generated by the random number generation section are applied, for cryptographic key data set as a cryptographic key for the reproduction object data and read from the information recording medium;
• and
• a decryption processing section for executing a decryption process of the reproduction object data with a cryptographic key generated based on the descrambled cryptographic key data.

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

• a seed generation section for generating a seed based on an error detection code set corresponding to reproduction object data;
• a random number generation section for generating random numbers based on the seed generated by the seed generation section;
• a bit position conversion section for executing a bit position conversion process, in which random numbers generated by the random number generation section are applied, for cryptographic key data set as a cryptographic key for the reproduction object data and read from the information recording medium;
• and
• a decryption processing section for executing a decryption process of the reproduction object data with a cryptographic key generated based on the data obtained by the bit position conversion process.

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

• a seed generation step of generating a seed based on an error detection code set corresponding to recording object data;
• a random number generation step of generating random numbers based on the seed generated by the seed generation step;
• a scramble processing step of executing a scrambling process, in which the random numbers generated by the random number generation step are applied, for cryptographic key data set as a cryptographic key for the recording object data;
• and
• a recording processing step of executing a recording process of a cryptographic key data recording signal generated based on scrambled data obtained by the scramble processing step.

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

• a seed generation step of generating a seed based on an error detection code set corresponding to recording object data;
• a random number generation step of generating random numbers based on the seed generated by the seed generation step;
• a bit position conversion step of executing a bit position conversion process, in which random numbers generated by the random number generation step are applied, for cryptographic key data set as a cryptographic key for the recording object data;
• and
• a recording processing step of executing a recording process of a cryptographic key data recording signal generated based on data obtained by the bit position conversion process.

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

• a seed generation step of generating a seed based on an error detection code set corresponding to reproduction object data;
• a random number generation step of generating random numbers based on the seed generated by the seed generation step;
• a descramble processing step of executing a descrambling process, in which the random numbers generated by the random number generation step are applied, for cryptographic key data set as a cryptographic key for the reproduction object data and read from the information recording medium;
• and
• a decryption processing step of executing a decryption process of the reproduction object data with a cryptographic key generated based on the descrambled cryptographic key data.

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

• a seed generation step of generating a seed based on an error detection code set corresponding to reproduction object data;
• a random number generation step of generating random numbers based on the seed generated by the seed generation step;
• a bit position conversion processing step of executing a bit position conversion process, in which random numbers generated by the random number generation step are applied, for cryptographic key data set as a cryptographic key for the reproduction object data and read from the information recording medium;
• and
• a decryption processing step of executing a decryption process of the reproduction object data with a cryptographic key generated based on data obtained by the bit position conversion process.

A computer program for executing a data recording process, comprising:

• a seed generation step of generating a seed based on an error detection code set corresponding to recording object data;
• a random number generation step of generating random numbers based on the seed generated by the seed generation step;
• a scramble processing step of executing a scrambling process, in which the random numbers generated by the random number generation step are applied, for cryptographic key data set as a cryptographic key for the recording object data;
• and
• a recording processing step of executing a recording process of a cryptographic key data recording signal generated based on the scrambled data.

A computer program for executing a reproduction process of data recorded as encrypted data on an information recording medium, comprising:

• a seed generation step of generating a seed based on an error detection code set corresponding to reproduction object data;
• a random number generation step of generating random numbers based on the seed generated by the seed generation step;
• a descramble processing step of executing a descrambling process, in which the random numbers generated by the random number generation step are applied, for cryptographic key data set as a cryptographic key for the reproduction object data and read from the information recording medium;
• and
• a decryption processing step of executing a decryption process of the reproduction object data with a cryptographic key generated based on the descrambled cryptographic key data.