Network communication decoder using key pattern encryption

• US 10,333,906 B2
• Filed: 03/30/2017
• Issued: 06/25/2019
• Est. Priority Date: 03/30/2017
• Status: Active Grant

• Current Assignee: Bank of America Corp.
• Original Assignee: Bank of America Corp.
• Inventors: Danielson, Christopher L.
• Primary Examiner(s): Moorthy, Aravind K
• Application Number:
  US15/474,334
• Publication Number:
  US 20180287784A1
• Time in Patent Office: 817 Days
• Field of Search: 380252, 380261, 380 43, 380277
• CPC Class Codes: H04L 63/0428 wherein the data content is protected, e.g. by encrypting or encapsulating the payload
• CPC Class Codes: H04L 9/0631 Substitution permutation network [SPN], i.e. cipher composed of a number of stages or rounds each involving linear and nonlinear transformations, e.g. AES algorithms

Abstract

A decoding device that includes a decoding engine implemented by a processor connected to a memory. The decoding engine is configured to receive an encoded signal. The encoding engine is further configured to determine an encoded signal byte value at an encoded signal byte location in the encoded signal. The encoded signal byte location is mapped to a key map byte location in a key map. The decoding engine is further configured to determine a key map byte value at the key map byte location in the key map. The decoding engine is further configured to set a decoded signal byte value with the encoded signal byte value at the decoded signal byte location in a decoded signal. The decoding engine is further configured to output the decoded signal.

Claims

1. A system comprising:

an encoder device comprising;

a first memory operable to store a first key map, wherein;

each byte of the first key map is mapped to a byte of a noise signal;

the value of each byte of the first key map identifies a byte location of a data signal; and

an encoding engine implemented by a first processor operably coupled to the first memory, and configured to;

obtain the data signal;

generate the noise signal, wherein the noise signal is at least as long as the data signal;

generate an encoded signal, wherein generating the encoded signal comprises iteratively for each byte of the first key map;

determining a key map byte value at a key map byte location in the first key map, wherein the key map byte value indicates a data signal byte location in the data signal;

determining a data signal byte value at the data signal byte location in the data signal; and

overwriting a noise signal byte value with the data signal byte value at a noise signal byte location in the noise signal when the key map byte value is not equal to zero, wherein;

 

the noise signal byte location corresponds with the key map byte location, and

 

the noise signal byte value at the noise signal byte location is unchanged when the key map byte value is equal to zero; and

transmit the encoded signal to a decoder device; and

the decoder device comprising;

a second memory operable to store a second key map, wherein;

each byte of the second key map is mapped to a byte of the encoded signal; and

the value of each byte of the second key map identifies a byte location of a decoded signal; and

a decoder engine implemented by a second processor operably coupled to the second memory, and configured to;

decode the encoded signal to generate the decoded signal, wherein decoding the encoded signal comprises iteratively for each byte of the encoded signal;

determining an encoded signal byte value at an encoded signal byte location in the encoded signal, wherein the encoded signal byte location is mapped to a key map byte location in the second key map;

determine a key map byte value at the key map byte location in the second key map, wherein the key map byte value identifies a decoded signal byte location;

discarding the encoded signal byte value when the key map byte value at the key map byte location is equal to zero; and

setting a decoded signal byte value with the encoded signal byte value at the decoded signal byte location in the decoded signal when the key map byte value at the key map byte location is not equal to zero; and

output the decoded signal.

2. The system of claim 1, wherein each key map byte value in the first key map has a unique value when the key map byte value is not zero.

3. The system of claim 1, wherein the value of each byte of the first key map identifies the byte location of the data signal using offset value.

4. The system of claim 1, wherein the first key map is the same length as the noise signal.

5. The system of claim 1, wherein the encryption engine is configured to generate the first key map, wherein generating the first key map comprises:

generating a key map template, wherein every byte of the first key map is set to zero; and

randomly assigning byte locations of the data signal to the key map template to generate the first key map.

6. The system of claim 1, wherein:

the data signal is an encrypted signal, and

the decoder engine is configured to decrypt the decoded signal.

7. The system of claim 1, wherein the decoded signal is shorter in length than the encoded signal.

8. The system of claim 1, the first key map and the second key map are identical.

9. A decoding device comprising:

a network interface configured to receive an encoded signal;

a memory operable to store a key map, wherein;

each byte of the key map is mapped to a byte of the encoded signal; and

the value of each byte of the key map identifies a byte location of a decoded signal; and

a decoder engine implemented by a processor operably coupled to the network interface and the memory, and configured to;

decode the encoded signal to generate the decoded signal, wherein decoding the encoded signal comprises iteratively for each byte of the encoded signal;

determining an encoded signal byte value at an encoded signal byte location in the encoded signal, wherein the encoded signal byte location is mapped to a key map byte location in the key map;

determine a key map byte value at the key map byte location in the key map, wherein the key map byte value identifies a decoded signal byte location;

discarding the encoded signal byte value when the key map byte value at the key map byte location is equal to zero; and

setting a decoded signal byte value with the encoded signal byte value at the decoded signal byte location in the decoded signal when the key map byte value at the key map byte location is not equal to zero; and

output the decoded signal.

10. The device of claim 9, wherein each key map byte value has a unique value when the key map byte value is not zero.

11. The device of claim 9, wherein the value of each byte of the key map identifies the byte location of the data signal using an offset value.

12. The device of claim 9, wherein the decoder engine is configured to receive the key map.

13. The device of claim 9, wherein the decoded signal is shorter in length than the encoded signal.

14. The device of claim 9, wherein the decoder engine is configured decrypt the decoded signal.

15. A decoding method comprising:

receiving an encoded signal;

decoding the encoded signal to generate a decoded signal, wherein decoding the encoded signal comprises iteratively for each byte of the encoded signal;

determining an encoded signal byte value at an encoded signal byte location in the encoded signal, wherein;

the encoded signal byte location is mapped to a key map byte location in a key map;

each byte of the key map is mapped to a byte of the encoded signal; and

the value of each byte of the key map identifies a byte location of the decoded signal;

determining a key map byte value at the key map byte location in the key map, wherein the key map byte value identifies a decoded signal byte location;

discarding the encoded signal byte value when the key map byte value at the key map byte location is equal to zero; and

setting a decoded signal byte value with the encoded signal byte value at the decoded signal byte location in the decoded signal when the key map byte value at the key map byte location is not equal to zero; and

outputting the decoded signal.

16. The method of claim 15, wherein each key map byte value has a unique value when the key map byte value is not zero.

17. The method of claim 15, wherein the value of each byte of the key map identifies the byte location of the data signal using an offset value.

18. The method of claim 15, further comprising receiving the key map.

19. The method of claim 15, wherein the decoded signal is shorter in length than the encoded signal.

20. The method of claim 15, further comprising decrypting the decoded signal.