A LOW-COST RFID TAG SEARCH METHOD PREVENTING THE REUSE OF MOBILE READER'S TAG-LIST

摘要

PURPOSE: A low costs RFID tag search method for preventing a recycling tag list of a mobile reader is provided to enable a reader to include a state which authentication key information of a tag, thereby preventing the recycling tag list. CONSTITUTION: A reader(10) stores an authentication key of a tag coded an exclusive OR operation as a list. The reader decodes an authentication key of a searching tag, and generates a random value. The reader calculates and hashes a first random value with the exclusive OR operation in the first authentication key, and calculates with the exclusive OR operation by using the first random value again, and generates a verification message. The reader transmits and generates a request message by using the exclusive OR operation with the first authentication key and the first random value. [Reference numerals] (10) Reader R; (20) Tag T; (AA) r_R generation