Verifying the ownership of an owner's authority in terms of product and service

8) An apparatus for verifying the authority in terms of an identifier of a product, a verification key for verifying the authority held at a terminal for an assignor of the authority involving said product, and the verification information of the assignor concerning the identifier of said product stored in a product database, comprising:

• means for receiving a verification key of an assignee with said authority and the verification key of the assignor with the authority held at said terminal;
• means for acquiring the verification key of said assignor from said product database;
• means for verifying the verification key of said assignor in terms of the verification information involving said product;
• and
• means for storing the verification key of said assignee as said verification information of said product database under the condition that said verification is successful.

18) A method for verifying the authority of at least one owner in terms of an identifier of a product, the first verification information for verifying the authority held at a terminal for an owner with the authority involving said product, and the second verification information for verifying the authority concerning the identifier of said product stored in a product database, comprising:

• a step of receiving said identifier and said first verification information;
• a step of acquiring said second verification information from said product DB;
• and
• a step of determining whether or not there is the authority from said first verification information and said second verification information.

25) A method for verifying the authority of at least one owner in terms of an identifier of a product, a verification key for verifying the authority held at a terminal for an assignor with the authority involving said product, and the verification information of the assignor concerning the identifier of said product stored in a product database, comprising:

• a step of receiving a verification key of an assignee with said authority and said verification key of the assignor with the authority held at said terminal;
• a step of acquiring said verification key of the assignor from said product DB;
• a step of verifying the verification key of said assignor in terms of the verification information involving said product;
• and
• a step of storing the verification key of said assignee as said verification information of said product DB under the condition that said verification is successful.