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1. WO2011006051 - SYSTEMS AND METHODS FOR PROVIDING PHYSICAL LAYER SECURITY

Note: Text based on automatic Optical Character Recognition processes. Please use the PDF version for legal matters

[ EN ]

What is claimed is:

1. A method of providing physical layer security comprising:

receiving message data at a pre-processing device in a wireless transmission device;

pre-processing the message data into channel data with the pre-processing device; transmitting the channel data from the wireless transmission device over a wireless transmission link having a path loss;

receiving the channel data at a post-processing module in a reception device; post-processing the channel data into the message data with the post-processing module; and

wherein an unauthorized reception device is unable to post-process the channel data when a path loss experienced over the transmission link is greater than a

predetermined value.

2. The method of providing physical layer security of Claim 1, wherein path loss is greater than the predetermined value when the unauthorized reception device is greater than a first distance from the wireless transmission device.

3. The method of providing physical layer security of Claim 1, wherein the path loss is greater than the predetermined value when the unauthorized reception device is outside a predetermined reception area for the wireless transmission device.

4. The method of providing physical layer security of Claim 1, wherein preprocessing the message data is performed with at least one linear shift-register.

5. The method of providing physical layer security of Claim 1, wherein preprocessing the message data is performed with a first linear shift-register in communication with a first interleaver, in further communication with a second linear shift-register.

6. The method of providing physical layer security of Claim 5, wherein postprocessing the channel data is performed with a first linear feedback shift-register in

communication with a first de-interleaver, in further communication with a second linear feedback shift-register.

7. A secure physical layer communication system comprising:

a first shift-register device;

a Last- In First-Out ("LIFO") memory device in communication with the first shift-register device; and

a second shift-register device in communication with the Last- In First-Out ("LIFO") memory device.

8. The secure physical layer communication system of Claim 7, wherein the secure physical layer communication system can both pre-process incoming message data and post-process incoming channel data.

9. The secure physical layer communication system of Claim 7, wherein the first shift-register device and the second shift-register device include a shift-register that implements a primitive polynomial over a Galois field.

10. A secure physical layer pre-processing device comprising:

a first Linear Shift-register ("LSR") in communication with an input of message data;

a first interleaver in communication with the first LSR; and

a second LSR in communication with the first interleaver, the second LSR having an output of channel data.

11. The secure physical layer pre-processing device of Claim 10, wherein the first LSR and second LSR are high degree LSRs.

12. The secure physical layer pre-processing device of Claim 10, further comprising a second interleaver in communication with the second LSR.

13. The secure physical layer pre-processing device of Claim 12, further comprising a third LSR in communication with the second interleaver.

14. A secure physical layer post-processing device comprising:

a first Linear Feedback Shift-Register ("LFSR") in communication with an input of channel data;

a first de-interleaver in communication with the first LFSR; and

a second LFSR in communication with the first de-interleaver, the second LFSR having an output of message data.

15. The secure physical layer post-processing device of Claim 14, wherein the first LFSR and second LFSR are high degree LFSRs.

16. The secure physical layer post-processing device of Claim 14, further comprising a second de-interleaver in communication with the second LFSR.

17. The secure physical layer post-processing device of Claim 16, further comprising a third LFSR in communication with the second interleaver.

18. A method of providing physical layer security comprising:

receiving message data at a pre-processing device in a transmission device;

processing the message data at the pre-processing device with a first Linear Shift- Register ("LSR");

processing the data at the pre-processing device with a first interleaver in communication with the first LSR;

processing the data at the pre-processing device with a second LSR in

communication with the first interleaver;

outputting channel data.

19. A method of providing physical layer security of Claim 18, further comprising: receiving channel data at a post-processing module in a reception device;

processing the channel data at the post-processing module with a first Linear Feedback Shift-Register ("LFSR");

processing the data at the post-processing module with a first de-interleaver in communication with the first LFSR;

processing the data at the post-processing module with a second LFSR in communication with the first de-interleaver;

outputting the message data.

20. The method of providing physical layer security of Claim 19, wherein an unauthorized reception device is unable to post-process the channel data when a path loss experienced by the reception device is greater than a predetermined value.