To solve the problem of the commodity identification and trace, the key element is EPC, i.e. Electronic Product Code [4], which is a coding system. It bases on the EAN.UCC bar coding, the global unify identification system. It expends this bar coding system to mark single items. The product e-code is
the next generation of product identification code, which can be the global only identity of object in logistics process, including the goods, containers, pallets, locations, etc. EPC is saved in the RFID tag, which includes silicon and an antenna. It can connect to some dynamic data, such as the origin of the goods or production date when the tag is read. This is very similar to the GTIN and VIN [5]. EPC is just like a key that is to achieve the relevant product message from the EPC net, thus EPC solves the problem of single item’s identity and trace, and builds a world's open identity standards.