RFID tag, operating method of RFID tag and operating method between RFID tag and RFID reader

An operating method of an RFID tag stored a first identification code, a second identification code, a set of data, and a password being one of a predetermined value indicating that the set of data is not under protection or a value not equal to the predetermined value obtained by an encryption of the first identification code and the second identification code with a predetermined algorithm indicating that the set of data is under protection, the set of data being accessible when a password verification procedure corresponding to the password is successfully performed prior to access of the set of data when under protection, the operating method comprising steps of:

• (a) receiving a request for accessing the second identification code;
• (b) checking whether the request comprises the first identification code;
• and
• (c) transmitting the second identification code when the step (b) is yes, even when the password stored in the memory id determined to be the value not equal to the predetermined value and the verification procedure fails
• wherein the RFID tag is configured to operate in either an open mode dictating any RFID reader can access data stored therein, or a closed mode dictating said password verification procedure is required to access the set of data under protection;
• wherein the predetermined value is assigned by the manufacture or determined by the design of the RFID tag, wherein the predetermined value is not received from an interrogating RFID reader and cannot be changed by a user during an operation.

An operating method between an RFID tag and an RFID reader, wherein the RFID tag stores a first identification code, a second identification code, a set of data, and a password being one of a predetermined value indicating that the set of data is not under protection or a value not equal to the predetermined value obtained by an encryption of the first identification code and the second identification code with a predetermined algorithm indicating that the set of data is under protection, wherein the set of data is accessible when a password verification procedure is successfully performed prior to access of the set of data when under protection while the password is determined to be the value not equal to the predetermined value, the operating method comprising steps of:

• (a) transmitting a second-identification-code request for accessing from the RFID reader;
• (b) receiving the second-identification-code request by the RFID tag and determining whether the second-identification-code request comprises the first identification code;
• and
• (c) transmitting the second identification code from the RFID tag to the RFID reader if the step (b) is yes, even when the password stored in the memory is determined to be the value not equal to the predetermined value and the password verification procedure fails;
• wherein the RFID tag is configured to operate in either an open mode dictating any RFID reader can access data stored therein, or a closed mode dictating said password verification procedure is required to access the set of data under protection;
• wherein the predetermined value is assigned by the manufacture or determined by the design of the RFID tag, wherein the predetermined value is not received from an interrogating RFID reader and cannot be changed by a user during an operation.