Electronic information distribution method and recording medium

An electronic information distribution method for distributing an electronic information by starting a restoration program to restore a processed electronic information to an original electronic information by giving indication to a user side apparatus capable of reading a recording medium, in which said processed electronic information made by providing said original electronic information to be distributed with the predetermined processing and said restoration program for restoring said processed electronic information to the condition prior to the processing are recorded, through the communication line from a management side apparatus, comprising:

• generating with said management side apparatus a first information at random, and transmitting said first information to said user side apparatus;
• generating with said user side apparatus a second information at random, generating a third information by providing said second information and the first information received from said management side apparatus with a first processing which can be inversely processed with said management side apparatus, and transmitting said third information to said management side apparatus;
• restoring with said management side apparatus the first information and the second information by providing the third information received from said user side apparatus with a processing inverse to said first processing, said processing inverse to said first processing including retrieving a fifth information from a database. comparing said restored first information with said user side generated first information, generating a fourth information by providing said restored second information with a second processing which can be inversely processed by said user side apparatus when the two data show coincidence, and transmitting said fourth information to said user side apparatus, and
• restoring the second information by providing the fourth information received from said management side apparatus with a processing inverse to said second processing, comparing said restored second information with said user side generated second information, and restoring said processed electronic information by starting said restoration program when the two data show coincidence.

An electronic information distribution method for distributing an electronic information by starting a restoration program to restore a processed electronic information to an original electronic information by giving indication to a user side apparatus capable of reading a recording medium, in which said processed electronic information made by providing said original electronic information to be distributed with the predetermined processing and said restoration program for restoring said processed electronic information to the condition prior to the processing are recorded, through the communication line from a management side apparatus, comprising:

• generating with said user side apparatus a parameter by using a first information inherent to said electronic information and a common information co-owned by said user side apparatus and said management side apparatus, generating a third information by providing an inherent second information related to said user side apparatus with a first processing based on said parameter, and transmitting said third information to said management side apparatus;
• generating with said management side apparatus said parameter from said first information and said common information being retrieved from a database, restoring the second information by providing the third information received from said user side apparatus with a processing inverse to said first processing by using said parameter, generating a fourth information by providing said restored second information with a second processing by using said parameter, and transmitting said fourth information to said user side apparatus, and
• restoring with said user side apparatus the second information by providing the fourth information received from said management side apparatus with a processing inverse to said second processing by using said parameter, comparing said restored second information with said inherent second information related to said user side apparatus, and restoring said processed electronic information by starting said restoration program when the two data show coincidence.

A computer program product for an electronic information distribution system from a management side apparatus to a user side apparatus, comprising:

• a computer usable storage medium used at said user side apparatus and having computer readable program code for distributing said electronic information by starting a restoration program to restore a processed electronic information to an original electronic information by giving indication to a user side apparatus capable of reading a recording medium, in which said processed electronic information made by providing said original electronic information to be distributed with the predetermined processing and said restoration program for restoring said processed electronic information to the condition prior to the processing are recorded, through the communication line from a management side apparatus, said computer readable program code comprising:
• computer readable program code for causing a computer to generate a first information at random;
• computer readable program code for causing a computer to generate a second information by providing said first information with a first processing which can be inversely processed with said management side apparatus;
• computer readable program code for causing a computer to transmit said second information to said management side apparatus;
• computer readable program code for causing a computer to receive a fourth information generated and transmitted by said management side apparatus by providing the first information, which is restored by providing the second information received from said user side apparatus with a processing inverse to said first processing, said processing inverse to said first processing including retrieving a fifth information from a database, with a second processing which can be inversely processed by said user side apparatus;
• computer readable program code for causing a computer to restore the first information by providing the fourth information received from said management side apparatus with a processing inverse to said second processing;
• computer readable program code for causing a computer to compare said restored first information with said first information generated by itself;
• and
• computer readable program code for causing a computer to start said restoration program when the comparison result between the two data show coincidence.

A computer program product for electronic information distribution system from a management side apparatus to a user side apparatus, comprising:

• a computer usable storage medium used at said management side apparatus and having computer readable program code for distributing said electronic information by starting a restoration program to restore a processed electronic information to an original electronic information by giving indication to a user side apparatus capable of reading a recording medium, in which said processed electronic information made by providing said original electronic information to be distributed with the predetermined processing and said restoration program for restoring said processed electronic information to the condition prior to the processing are recorded, through the communication line from a management side apparatus, said computer readable program code comprising:
• computer readable program code for causing a computer to receive a second information generated and transmitted by said user side apparatus by providing a first information, which is generated at random with a first processing that can be inversely processed by said management side apparatus;
• computer readable program code for causing a computer to restore the first information by providing the received second information with a processing inverse to said first processing, said processing inverse to said first processing including retrieving a fifth information from a database;
• computer readable program code for causing a computer to generate a fourth information by providing the restored first information with a second processing which can be inversely processed with said user side apparatus;
• and
• computer readable program code for causing a computer to transmit the fourth information to said user side apparatus.

A computer program product for electronic information distribution system from a management side apparatus to a user side apparatus, comprising:

• a computer usable storage medium used at said user side apparatus and having computer readable program code for distributing said electronic information by starting a restoration program to restore a processed electronic information to an original electronic information by giving indication to a user side apparatus capable of reading a recording medium, in which said processed electronic information made by providing said original electronic information to be distributed with the predetermined processing and said restoration program for restoring said processed electronic information to the condition prior to the processing are recorded, through the communication line from a management side apparatus, said computer readable program code comprising:
• computer readable program code for causing a computer to receive a first information generated at random and transmitted by said management side apparatus;
• computer readable program code for causing a computer to generate a second information at random;
• computer readable program code for causing a computer to generate a third information by providing said second information and said first information received from said management side apparatus with a first processing that can be processed inversely by said management side apparatus;
• computer readable program code for causing a computer to transmit said third information to said management side apparatus;
• computer readable program code for causing a computer to receive a fourth information generated and transmitted by said management side apparatus by providing the third information received from said user side apparatus with a processing inverse to said first processing, said processing inverse to said first processing including retrieving a fifth information from a database, to restore said first information and said second information, comparing said restored first information with said first information generated by itself, and the restored second information is provided with a second processing which can be inversely processed by said user side apparatus when the two data show coincidence;
• computer readable program code for causing a computer to restore the second information by providing said received fourth information with a processing inverse to said second processing;
• computer readable program code for causing a computer to compare said restored second information with said second information generated by itself;
• and
• computer readable program code for causing a computer to start said restoration program when the comparison result between the two data show coincidence.

A computer program product for an electronic information distribution system from a management side apparatus to a user side apparatus, comprising:

• a computer usable storage medium used at said management side apparatus and having computer readable program code for distributing said electronic information by starting a restoration program to restore a processed electronic information to an original electronic information by giving indication to a user side apparatus capable of reading a recording medium, in which said processed electronic information made by providing said original electronic information to be distributed with the predetermined processing and said restoration program for restoring said processed electronic information to the condition prior to the processing are recorded, through the communication line from a management side apparatus, said computer readable program code comprising:
• computer readable program code for causing a computer to generate a first information at random;
• computer readable program code for causing a computer to transmit said first information to said user side apparatus;
• computer readable program code for causing a computer to receive a third information generated and transmitted by said user side apparatus by providing a second information generated at random and the first information received from said management side apparatus with a first processing which can be inversely processed with said management side apparatus;
• computer readable program code for causing a computer to restore the first information and the second information by providing said third information received from said user side apparatus with a processing inverse to said first processing, said processing inverse to said first processing including retrieving a fifth information from a database;
• computer readable program code for causing a computer to compare said restored first information with said first information generated by itself;
• computer readable program code for causing a computer to generate a fourth information by providing said restored second information with a second processing which can be inversely processed with said user side apparatus when the comparison result between the two data show coincidence;
• and
• computer readable program code for causing a computer to transmit said fourth information to said user side apparatus.

A computer program product for an electronic information distribution system from a management side apparatus to a user side apparatus, comprising:

• a computer usable storage medium used at said user side apparatus and having computer readable program code for distributing said electronic information by starting a restoration program to restore a processed electronic information to an original electronic information by giving indication to a user side apparatus capable of reading a recording medium, in which said processed electronic information made by providing said original electronic information to be distributed with the predetermined processing and said restoration program for restoring said processed electronic information to the condition prior to the processing are recorded, through the communication line from a management side apparatus, said computer readable program code comprising:
• computer readable program code for causing a computer to generate a parameter by using a first information inherent to said electronic information and a common information previously co-owned by said user side apparatus and said management side apparatus;
• computer readable program code for causing a computer to generate a third information by providing an inherent second information related to said user side apparatus with a first processing based on said parameter;
• computer readable program code for causing a computer to transmit said third information to said management side apparatus;
• computer readable program code for causing a computer to receive a fourth information generated and transmitted by said management side apparatus by providing the third information received from said user side apparatus with a processing inverse to said first processing to restore the second information by using said parameter generated from said first information and said common information being retrieved from a database, and providing said restored second information with said second processing by using said parameter;
• computer readable program code for causing a computer to restore the second information by providing said received fourth information with a processing inverse to said second processing;
• computer readable program code for causing a computer to compare said restored second information with said inherent second information related to said user side apparatus;
• and
• computer readable program code for causing a computer to start said restoration program when the comparison result between the two data show coincidence.

A computer program product for electronic information distribution system from a management side apparatus to a user side apparatus, comprising:

• a computer usable storage medium used at said management side apparatus and having computer readable program code for distributing said electronic information by starting a restoration program to restore a processed electronic information to an original electronic information by giving indication to a user side apparatus capable of reading a recording medium in which said processed electronic information made by providing the electronic information to be distributed with the predetermined processing and said restoration program for restoring said processed electronic information to the condition prior to the processing are recorded, through the communication line from a management side apparatus, said computer readable program code comprising:
• computer readable program code for causing a computer to receive a third information generated and transmitted by said user side apparatus by providing an inherent second information related to said user side apparatus with a first processing based on a parameter which is generated by using a common information previously co-owned by said first information inherent to said electronic information;
• computer readable program code for causing a computer to generate said parameter from said first information and said common information being retrieved from a database;
• computer readable program code for causing a computer to restore the second information by providing the third information received from said user side apparatus with a processing inverse to said first processing by using said parameter;
• computer readable program code for causing a computer to generate a fourth information by providing said restored second information with a second processing by using said parameter;
• and
• computer readable program code for causing a computer to transmit said fourth information to said user side apparatus.

An electronic information distribution method, comprising:

• transferring processed electronic information to a user side apparatus as recorded electronic information;
• internally generating by said user side apparatus a first information at random, processing the first information to produce second information, and transmitting the second information to a management side apparatus;
• restoring with said management side apparatus the first information with a processing inverse to said processing of the first information and including retrieving a fourth information from a database, from the received second information, processing the first information to produce third information, and transmitting the third information to the user side apparatus;
• and
• restoring with said user side apparatus the first information by processing the received third information, comparing the restored first information with the internally generated first information, and restoring said recorded processed electronic information upon coincidence.

An electronic information distribution system, comprising:

• a user side apparatus receiving recorded processed electronic information, internally generating a first information at random, processing the first information to produce second information, and transmitting the second information;
• and
• a management side apparatus receiving the second information, restoring the second information into the first information with a processing inverse to said processing of the first information and including retrieving a fourth information from a database. processing the first information to produce third information, and transmitting the third information to said user side apparatus,
• said user side apparatus restoring the first information by processing the received third information, comparing the restored first information with the internally generated first information, and restoring said recorded processed electronic information upon coincidence.

An electronic information distribution system, comprising:

• a user side computer apparatus storing code to receive recorded processed electronic information, internally generate a first information at random, process the first information to produce second information, with a processing inverse to said processing of the first information and including retrieving a fourth information from a database. and transmit the second information;
• and
• a management side computing apparatus storing code to receive the second information, restore the second information into the first information, process the first information to produce third information, and transmit the third information to said user side apparatus,
• said user side apparatus storing code to restore the first information by processing the received third information, compare the restored first information with the internally generated first information, and restore said recorded processed electronic information upon coincidence.