Data processing system and method for mutual identification between apparatuses

摘要

A storage unit in a first mutual identification unit stores master key data and a second storage unit in a second mutual identification unit stores identification key data. A random number generating unit generates a number that is used to select a master key and a corresponding identification key at the mutual identification units. The first mutual identification unit generates an estimate of the selected identification key using the selected master key and uses this estimate as a common key when performing mutual identification with the second mutual identification unit.