Securely Providing a Receiver Unit with a Replica Pseudo-Random Noise Code

• US 20150381308A1
• Filed: 06/27/2015
• Published: 12/31/2015
• Est. Priority Date: 06/27/2014
• Status: Active Grant

• Current Assignee: Siemens AG
• Original Assignee: Siemens AG
• Inventors: Falk, Rainer
• Granted Patent: US 10,659,187 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: G01S 19/13 Receivers
• CPC Class Codes: G01S 19/21 Interference related issues ; Issues related to cross-correlation, spoofing or other methods of denial of service
• CPC Class Codes: G01S 19/215 issues related to spoofing
• CPC Class Codes: G01S 19/37 Hardware or software details of the signal processing chain
• CPC Class Codes: G06F 21/606 by securing the transmission between two devices or processes
• CPC Class Codes: H04K 1/02 by adding a second signal to make the desired signal unintelligible
• CPC Class Codes: H04L 9/002 Countermeasures against attacks on cryptographic mechanisms network architectures or network communication protocols for protection against malicious traffic H04L63/1441

Abstract

A method for securely providing a receiver unit with a replica pseudo-random noise code is provided. The replica pseudo-random noise code is provided in a restricted manner based on a result of an admissibility check. In order to carry out the admissibility check, values are recorded and are compared with predefined threshold values.

Claims

1. A method for securely providing a receiver unit with a replica pseudo-random noise code, the method comprising:

carrying out, by a processor, an admissibility check, the carrying out of the admissibility check comprising recording and comparing values with predefined threshold values; and

providing the replica pseudo-random noise code in a restricted manner based on a result of the admissibility check.

2. The method of claim 1, further comprising carrying out a correlation with a reception signal using the replica pseudo-random noise code.

3. The method of claim 1, wherein a pseudo-random noise code contained in a reception signal received by the receiver unit is decodable using a correlation method with the aid of the replica pseudo-random noise code.

4. The method of claim 1, further comprising evaluating a pseudo-random noise signal contained in a reception signal received by the receiver unit using a correlation method.

5. The method of claim 1, wherein a pseudo-random noise signal is received by the receiver unit as part of a reception signal.

6. The method of claim 5, wherein the reception signal is a satellite navigation signal.

7. The method of claim 5, wherein carrying out the admissibility check comprises recording a satellite identifier of the reception signal.

8. The method of claim 5, wherein carrying out the admissibility check comprises recording a frequency band of the reception signal.

9. The method of claim 1, wherein carrying out the admissibility check comprises acquiring an item of information relating to satellite orbit data.

10. The method of claim 1, wherein carrying out the admissibility check comprises recording a time value.

11. The method of claim 1 wherein carrying out the admissibility check comprises recording an acceleration value or a position value of the receiving unit using a sensor.

12. The method of claim 1, wherein carrying out the admissibility check comprises checking a history of replica pseudo-random noise codes provided temporally before carrying out the check.

13. A provision unit for securely providing a receiver unit with a replica pseudo-random noise code, the provision unit comprising:

an admissibility checking unit configured to provide the replica pseudo-random noise code in a restricted manner based on a result of an admissibility check, the admissibility check comprising recordation and comparison of values with predefined threshold values.

14. The provision unit of claim 13, wherein the replica pseudo-random noise code is generateable by a replica pseudo-random noise code generator of the provision unit or an external replica pseudo-random noise code generator connectable to the provision unit.

15. The provision unit of claim 13, further comprising a key generator or a key memory configured to generate a cryptographic key, a cryptographic replica pseudo-random noise code being generateable using the cryptographic key.

16. The provision unit of claim 13, wherein the provision unit is formed on a receiver with a receiver unit.

17. The provision unit of claim 16, wherein tamper protection is provided for the provision unit for the purpose of detecting manipulation or damage.