Information recording apparatus and method, information reproducing apparatus and method, information recording medium and program information recording medium

An information recording apparatus comprising:

• a generating device for encrypting recording information to be recorded in an information recording medium by using a predetermined key information to generate encrypted recording information;
• an encrypted key information generating device for encrypting the key information by using identification information recorded on the information recording medium as being unique to each of the information recording media to generate encrypted key information;
• and
• a recording device for recording the generated encrypted recording information and the generated encrypted key information, in the information recording medium corresponding to the identification information used for the generation of the encrypted key information.

An information recording medium comprising:

• (i) an information recording region for recording
• encrypted recording information obtained through encryption of recording information to be recorded in the information recording medium by using a predetermined key information and
• encrypted key information obtained through encryption of the key information by using identification information unique to each of the information recording media;
• and
• (ii) an identification information recording region in which the identification information corresponding to the information recording medium is recorded.

An information reproducing apparatus for reproducing information from an information recording medium in which substituted recording information obtained by substituting substitute information generated by using identification information unique to each of the information recording media for part of recording information and the identification information corresponding to the information recording medium are recorded;

• the information reproducing apparatus comprising:
• a detecting device for detecting the substituted recording information from the information recording medium;
• an identification information detecting device for detecting the identification information from the information recording medium;
• a substitute information extracting device for extracting the substitute information from the detected substituted recording information;
• an identification information extracting device for extracting the identification information from the extracted substitute information;
• a comparing device for comparing the identification information extracted from the substitute information with the identification information detected from the information recording medium;
• and
• a reproducing device for reproducing the recording information obtained from the detected substituted recording information only if the identification information extracted from the substitute information matches the identification information detected from the information recording medium.

An information reproducing apparatus for reproducing information from an information recording medium in which identification information unique to each of the information recording media, encrypted recording information obtained through encryption of recording information to be recorded therein by using a predetermined key information, and encrypted key information obtained through encryption of the key information by using the identification information are recorded;

• the information reproducing apparatus comprising:
• a detecting device for detecting the encrypted recording information and encrypted key information from the information recording medium;
• an identification information detecting device for detecting the identification information from the information recording medium;
• a key information generating device for decrypting the detected encrypted key information by using the detected identification information to generate the key information;
• and
• a reproducing device for decrypting the detected encrypted recording information by using the generated key information to reproduce the recording information.

An information recording method comprising:

• a substitute information generating process of generating substitute information by using identification information unique to each of information recording media in which recording information is to be recorded;
• a substituting process of generating substituted recording information by substituting the generated substitute information for part of the recording information;
• and
• a recording process of recording the generated substituted recording information in the information recording medium corresponding to the identification information used for the generation of the substitute information.

An information recording method comprising:

• a generating process of encrypting recording information to be recorded in an information recording medium by using a predetermined key information to generate encrypted recording information;
• an encrypted key information generating process of encrypting the key information by using identification information recorded on the information recording medium as being unique to each of the information recording media to generate encrypted key information;
• and
• a recording process of recording the generated encrypted recording information and the generated encrypted key information, in the information recording medium corresponding to the identification information used for the generation of the encrypted key information.

An information reproducing method for reproducing information from an information recording medium in which substituted recording information obtained by substituting substitute information generated by using identification information unique to each of the information recording media for part of recording information and the identification information corresponding to the information recording medium are recorded;

• the information reproducing method comprising:
• a detecting process of detecting the substituted recording information from the information recording medium;
• an identification information detecting process of detecting the identification information from the information recording medium;
• a substitute information extracting process of extracting the substitute information from the detected substituted recording information;
• an identification information extracting process of extracting the identification information from the extracted substitute information;
• a comparing process of comparing the identification information extracted from the substitute information with the identification information detected from the information recording medium;
• and
• a reproducing process of reproducing the recording information obtained from the detected substituted recording information only if the identification information extracted from the substitute information matches the identification information detected from the information recording medium.

An information reproducing method for reproducing information from an information recording medium in which identification information unique to each of the information recording media, encrypted recording information obtained through encryption of recording information to be recorded therein by using a predetermined key information, and encrypted key information obtained through encryption of the key information by using the identification information are recorded;

• the information reproducing method comprising:
• a detecting process of detecting the encrypted recording information and encrypted key information from the information recording medium;
• an identification information detecting process of detecting the identification information from the information recording medium;
• a key information generating process of decrypting the detected encrypted key information by using the detected identification information to generate the key information;
• and
• a reproducing process of decrypting the detected encrypted recording information by using the generated key information to reproduce the recording information.

A program information recording medium in which an information recording control program is readably recorded by a computer included in an information recording apparatus for recording information in an information recording medium, the information recording control program causing the computer to function as information recording control devices, the information recording control devices comprising:

• a substitute information generating device for generating substitute information by using identification information unique to each of information recording media in which recording information is to be recorded;
• a substituting device for generating substituted recording information by substituting the generated substitute information for part of the recording information;
• and
• a recording device for recording the generated substituted recording information in the information recording medium corresponding to the identification information used for the generation of the substitute information.

A program information recording medium in which an information recording control program is readably recorded by a computer included in an information recording apparatus for recording information in an information recording medium, the information recording control program causing the computer to function as information recording control devices, the information recording control devices comprising:

• a generating device for encrypting recording information to be recorded in an information recording medium by using a predetermined key information to generate encrypted recording information;
• an encrypted key information generating device for encrypting the key information by using identification information recorded on the information recording medium as being unique to each of the information recording media to generate encrypted key information;
• and
• a recording device for recording the generated encrypted recording information and the generated encrypted key information, in the information recording medium corresponding to the identification information used for the generation of the encrypted key information.

A program information recording medium in which an information reproducing control program is readably recorded by a computer included in an information reproducing apparatus for reproducing information from an information recording medium in which substituted recording information obtained by substituting substitute information generated by using identification information unique to each of the information recording media for part of recording information and the identification information corresponding to the information recording medium are recorded, the information reproducing control program causing the computer to function as information reproducing control devices, the information reproducing control devices comprising:

• a detecting device for detecting the substituted recording information from the information recording medium;
• an identification information detecting device for detecting the identification information from the information recording medium;
• a substitute information extracting device for extracting the substitute information from the detected substituted recording information;
• an identification information extracting device for extracting the identification information from the extracted substitute information;
• a comparing device for comparing the identification information extracted from the substitute information with the identification information detected from the information recording medium;
• and
• a reproducing device for reproducing the recording information obtained from the detected substituted recording information only if the identification information extracted from the substitute information matches the identification information detected from the information recording medium.

An information recording medium in which an information reproducing control program is readably recorded by a computer included in an information reproducing apparatus for reproducing information from an information recording medium in which substituted recording information obtained by substituting substitute information generated by using identification information unique to each of the information recording media for part of recording information and the identification information corresponding to the information recording medium are recorded, the information reproducing control program causing the computer to function as information reproducing control devices, the information reproducing control devices comprising:

• a detecting device for detecting the encrypted recording information and encrypted key information from the information recording medium;
• an identification information detecting device for detecting the identification information from the information recording medium;
• a key information generating device for decrypting the detected encrypted key information by using the detected identification information to generate the key information;
• and
• a reproducing device for decrypting the detected encrypted recording information by using the generated key information to reproduce the recording information.