Management apparatus and management method

A management apparatus, comprising:

• a memory;
• and
• a processor coupled to the memory and the processor configured to:
• generate a data processing sequence in which a plurality of processing histories including processing contents of data are linked by chain coupling;
• set a first processing history, to which access is restricted, in the data processing sequence;
• generate a second processing history that is associated with the first processing history;
• chain-couple the second processing history to the data processing sequence;
• generate a third processing history that is chain-coupled to the first processing history and the second processing history;
• disclose a first data chain that passes the first processing history to an owner of an access right to the first processing history;
• and
• disclose a second data chain that passes the second processing history without passing the first processing history to a non-owner of the access right.

A management method, comprising:

• generating, by a computer, a data processing sequence in which a plurality of processing histories including processing contents of data are linked by chain coupling;
• setting a first processing history, to which access is restricted, in the data processing sequence;
• generating a second processing history that is associated with the first processing history;
• chain-coupling the second processing history to the data processing sequence;
• generating a third processing history that is chain-coupled to the first processing history and the second processing history;
• disclosing a first data chain that passes the first processing history to an owner of an access right to the first processing history;
• and
• disclosing a second data chain that passes the second processing history without passing the first processing history to a non-owner of the access right.