Patent ID: 8212651
Filing Date: 2012-07-03
Classification: G06Q,H04L

Abstract:
1. A method for identifying an authentication status of a first item through use of an algorithm configured to be executed within a first Radio Frequency Identifier (RFID) tag associated with the first item and configured to be executed within a second RFID tag associated with a second item that is a genuine representation of the first item, wherein the algorithm performs: receiving a first parameter as a first input and a second parameter as a second input; forming a concatenation (C) of a parameter value, the second parameter, and a key value; computing a hash (H) by applying a hashing function to the concatenation C; and returning an identifier (Id) as a first output and the hash H as a second output, wherein the algorithm determines the parameter value to be the identifier Id if the first parameter is zero or to be the first parameter if the first parameter is not zero, wherein the method is performed by an apparatus comprising an RFID reader and a computer coupled to the RFID reader, and wherein the method comprises: said computer generating a random number (R); after said generating the random number R, said RFID reader transmitting zero (0) and the random number R from the RFID reader to the first RFID tag, wherein algorithm in the first RFID tag is configured to be executed using the transmitted zero and random number R as the first and second parameter, respectively, a first secret key stored in the first RFID tag as the key value, and an identifier Id after said transmitting zero and the random number R, said RFID reader receiving from the first RFID tag first data comprising the identifier Id after said receiving the first data, said computer determining that the identifier Id after determining that the identifier Id after said transmitting the identifier Id after said receiving the second data, said computer determining the authentication status of the first item by ascertaining whether H said computer communicating the authentication status to a user.