Method of wireless communication using authentication information

• US 8,576,785 B2
• Filed: 12/19/2008
• Issued: 11/05/2013
• Est. Priority Date: 12/19/2008
• Status: Active Grant

• Current Assignee: Robert Bosch GmbH
• Original Assignee: Robert Bosch GmbH
• Inventors: Keshavarzian, Abtin, Tian, Yuan, Venkatraman, Lakshmi
• Primary Examiner(s): Moore, Ian N
• Assistant Examiner(s): Huynh, Dung B
• Application Number:
  US12/339,505
• Publication Number:
  US 20100157890A1
• Time in Patent Office: 1,782 Days
• Field of Search: None
• US Class Current: 370/329
• CPC Class Codes: H04L 63/123 received data contents, e.g. message integrity
• CPC Class Codes: H04L 67/12 specially adapted for proprietary or special-purpose networking environments, e.g. medical networks, sensor networks, networks in vehicles or remote metering networks
• CPC Class Codes: H04W 12/106 Packet or message integrity

Abstract

A data communication method includes providing a sender node having a data packet of information. The data packet includes at least one first field and a second field. The second field has content that is dependent upon actual content of the at least one first field. The content of the second field of the data packet is transmitted from the sender node to a receiver node. The receiver node is used to predict the actual content of the first field of the data packet. The receiver node is used to calculate the content of the second field of the data packet based upon the predicted content of the first field. The predicted content of the first field is confirmed to be equivalent to the actual content of the first field. The confirming step includes comparing the calculated content of the second field to the transmitted content of the second field.

Claims

1. A data communication method comprising the steps of:

providing a sender node having a data packet of information, the data packet including at least one first field and a second field, the second field having content that is dependent upon actual content of the at least one first field;

transmitting the content of the second field of the data packet from the sender node to a receiver node;

using the receiver node to predict a plurality of possible actual contents of the first field of the data packet, each of the possible actual contents having a probability above a threshold probability value; and

using the receiver node to calculate a plurality of possible contents of the second field of the data packet based upon respective ones of the predicted possible actual contents of the first field.

2. The method of claim 1 wherein the receiver node predicts the actual content of the first field of the data packet before the content of the second field of the data packet is received by the receiver node, the content of the second field being calculated before the transmitted content of the second field is received by the receiver node.

3. The method of claim 1 wherein the prediction of the plurality of possible actual contents of the first field of the data packet is based upon at least one of knowledge by the receiver node of prior communications, a lookup table, and a formula.

4. The method of claim 1 wherein the content of the second field comprises one of a Message Authentication Code and a Message Integrity Code.

5. The method of claim 1 wherein the content of the first field comprises a payload.

6. The method of claim 1 wherein it is confirmed that the predicted content of the first field is equivalent to the actual content of the first field if the calculated content of the second field matches the transmitted content of the second field.

7. The method of claim 1 wherein the actual content of the first field is not transmitted from the sender node to the receiver node.

8. The method of claim 1 comprising the further step of confirming that one said predicted possible content of the first field is equivalent to the actual content of the first field, the confirming step including comparing the calculated possible contents of the second field to the transmitted content of the second field.

9. A data communication method comprising the steps of:

providing a data packet including an actual payload and a Message Authentication Code (MAC);

transmitting the MAC from a sender node to a receiver node;

using the receiver node to identify a plurality of possible payloads each having a probability above a threshold probability value, the identifying occurring before the MAC is received by the receiver node;

using the receiver node to calculate a respective said MAC for each of the identified possible payloads, the MACs being calculated before the transmitted MAC is received by the receiver node; and

determining whether one of the identified possible payloads is equivalent to the actual payload, the determining step including comparing the calculated MACs to the transmitted MAC.

10. The method of claim 9 wherein the identification of the plurality of possible payloads is based upon at least one of knowledge by the receiver node of prior communications, a lookup table, and a formula.

11. The method of claim 9 wherein it is determined that one of the identified possible payloads is equivalent to the actual payload if one of the calculated MACs matches the transmitted MAC.

12. The method of claim 9 wherein the actual payload is not transmitted from the sender node to the receiver node.

13. The method of claim 9 wherein the sender node and the receiver node are synchronized in the time domain.

14. A data communication method comprising the steps of:

providing a sender node having a data packet of information, the data packet including at least one first field and a second field, the second field having content that is dependent upon actual content of the at least one first field;

transmitting the content of the second field of the data packet from the sender node to a receiver node;

using the receiver node to predict a plurality of possible actual contents of the first field of the data packet before the content of the second field of the data packet is received by the receiver node, each of the possible actual contents having a probability above a threshold probability value, the prediction being based upon at least one of knowledge by the receiver node of prior communications, a lookup table, and a formula;

using the receiver node to calculate a plurality of possible contents of the second field of the data packet based upon respective ones of the predicted possible actual contents of the first field, the plurality of possible contents of the second field being calculated before the transmitted content of the second field is received by the receiver node; and

confirming that one of the predicted possible contents of the first field is equivalent to the actual content of the first field, the confirming step including comparing the calculated possible contents of the second field to the transmitted content of the second field.

15. The method of claim 14 wherein the content of the second field comprises one of a Message Authentication Code and a Message Integrity Code.

16. The method of claim 14 wherein the content of the first field comprises a payload.

17. The method of claim 14 wherein it is confirmed that one of the predicted possible contents of the first field is equivalent to the actual content of the first field if one of the calculated possible contents of the second field matches the transmitted content of the second field.

18. The method of claim 14 wherein the actual content of the first field is not transmitted from the sender node to the receiver node.

19. The method of claim 14 wherein the sender node and the receiver node are synchronized in the time domain.

20. The method of claim 14 wherein the data packet comprises a control packet exchanged periodically between the sender node and the receiver node to one of confirm and monitor proper functioning of a network in which the sender node and the receiver node are disposed.