Node device, shared information update method, shared information preservation method, shared information update processing program, and shared information storage processing program

摘要

The present invention provides a node apparatus, a shared information updating method, a shared information storing method, a shared information updating process program, a shared information storing process program, and the like capable of efficiently obtaining shared information in the latest state at any time without providing a management server. The invention relates to a node apparatus in an information distribution system having a plurality of node apparatuses connected to each other via a network, including: a shared information memory means for memorizing first shared information to be commonly used by the plurality of node apparatuses; an identification information generating means for generating unique identification information corresponding to the first shared information on the basis of the first shared information; a node apparatus identifying means for identifying a node apparatus as a management source of the first shared information on the basis of the generated first identification information; an update information obtaining means for obtaining update information corresponding to the first shared information from the identified node apparatus; and a shared information updating means for updating the first shared information memorized in the shared information memory means to second shared information on the basis of the obtained update information.