Near field communication (NFC) device and method for selectively securing records in a near field communication data exchange format (NDEF) message
A method and device for selectively securing records in a Near Field Communication Data Exchange Format (NDEF) message in a Near Field Communication (NFC) device are provided. The method includes generating a record by setting a first field to ‘0’ and setting a second field to a predefined value, wherein the record indicates a beginning of at least one record to be secured in the NDEF message; and placing the record in the NDEF message, wherein, at least one record preceding the record is unsecured and at least one record following the record is secured.
1. A method for selectively securing records in a Near Field Communication Data Exchange Format (NDEF) message in a Near Field Communication (NFC) device, the method comprising:
generating a first record by setting at least one sub-field to a predefined value that indicates at least one second record preceding the first record in the NDEF message is unsecured and at least one third record following the first record in the NDEF message is secured; and
placing the first record in the NDEF message, wherein the at least one third record following the first record in the NDEF message is secured.
2. The method of claim 1 , wherein the at least one unsecured second record preceding the first record spans from a beginning of the NDEF message to the first record.
3. The method of claim 1 , wherein the at least one unsecured second record preceding the first record spans from a fourth record preceding the first record to the first record.
4. The method of claim 1 , wherein the at least one secured third record following the first record is secured by using a fifth record that includes a valid signature.
5. The method of claim 4 , further comprising deleting the at least one unsecured second record preceding the first record in the NDEF message without changing the valid signature in the fifth record.
6. The method of claim 4 , further comprising modifying the at least one unsecured second record preceding the first record in the NDEF message, without changing the valid signature in the fifth record.
7. The method of claim 4 , further comprising adding the at least one unsecured second record preceding the first record in the NDEF message, without changing the valid signature in the fifth record.
8. The method of claim 1 , wherein the first record is generated in a form of a signature record, and
wherein the first record does not have a signature.
9. A Near Field Communication (NFC) device for selectively securing records in a Near Field Communication Data Exchange Format (NDEF) message, the NFC device comprising:
a processor for:
generating a first record by setting at least one sub-field to a predefined value that indicates at least one second record preceding the first record in the NDEF message is unsecured and at least one third record following the first record in the NDEF message is secured, and
placing the first record in the NDEF message, wherein the at least one third record following the first record in the NDEF message is secured; and
a transmitter for transmitting the NDEF message.
10. The device of claim 9 , wherein the at least one unsecured second record preceding the first record spans from a beginning of the NDEF message to the first record.
11. The device of claim 9 , wherein the at least one unsecured second record preceding the first record spans from a fourth record preceding the first record to the first record.
12. The device of claim 9 , wherein the at least one secured third record following the first record is secured by using a fifth record that includes a valid signature.
13. The device of claim 12 , wherein the processor deletes the at least one unsecured second record preceding the first record in the NDEF message without changing the valid signature in the fifth record.
14. The device of claim 12 , wherein the processor modifies the at least one unsecured second record preceding the first record in the NDEF message, without changing the valid signature in the fifth record.
15. The device of claim 12 , wherein the processor adds the at least one unsecured second record preceding the first record in the NDEF message, without changing the valid signature in the fifth record.
16. The device of claim 9 , wherein the first record is generated in a form of a signature record, and
wherein the first record does not have a signature.