Method for transmitting and receiving data, in particular for secure exchanges between an aircraft and a ground base, related devices and aircraft equipped with such devices

• US 8,572,390 B2
• Filed: 03/27/2007
• Issued: 10/29/2013
• Est. Priority Date: 03/29/2006
• Status: Active Grant

• Current Assignee: Airbus Operations SAS (Airbus SE)
• Original Assignee: Airbus Operations SAS (Airbus SE)
• Inventors: Leclercq, Agnes, Colle-Morlec, Cecile
• Primary Examiner(s): NGUYEN, THU HA T
• Application Number:
  US12/294,311
• Publication Number:
  US 20090138716A1
• Time in Patent Office: 2,408 Days
• Field of Search: 713/168, 713/181, 713/190, 713/191, 380/217, 380/229, 380/239, 380/269, 714/746, 714/797
• US Class Current: 713/181
• CPC Class Codes: H04B 7/18508 with satellite system used as relay, i.e. aeronautical mobile satellite service
• CPC Class Codes: H04L 2209/30 Compression, e.g. Merkle-Damgard construction
• CPC Class Codes: H04L 2209/80 Wireless
• CPC Class Codes: H04L 9/3236 using cryptographic hash functions

Abstract

A method for transmitting data, a receiving method, related devices, and an aircraft equipped with the devices. The method includes determining an authentication word of the data; processing the data to obtain processed data; and transmitting the processed data on a transmission channel.

Claims

1. A method for emission of data, comprising:

determining an authentication word for the data, the authentication word relating to the data before processing;

processing the data to obtain processed data, the processing including an encryption of the data and a compression of the encrypted data; and

emitting the processed data on a transmission channel.

2. The emission method according to claim 1, wherein the determining includes application of a hash function to the data.

3. The emission method according to claim 2, wherein the application of the hash function uses a cryptographic key.

4. The emission method according to claim 1, wherein the encryption is applied to the data and to the authentication word.

5. The emission method according to claim 1, wherein the processing includes conversion of 8-bit words to 6-bit words.

6. The emission method according to claim 1, wherein the transmission channel is a channel for exchange of data between an aircraft and a ground base.

7. A method for reception of data, comprising:

receiving of the data on a transmission channel;

processing of the received data, the processing including a decompression of the received data and a decryption of the decompressed data; and

verifying of authentication of the processed data.

8. The reception method according to claim 7, wherein the verifying:

includes

calculating of an imprint of at least part of the processed data; and

comparing of the calculated imprint with a received imprint.

9. The reception method according to claim 8, wherein the calculating of the imprint includes application of a hash function to the part of the data.

10. The reception method according to claim 9, wherein the application of the hash function uses a cryptographic key.

11. The reception method according to claim 9, wherein the received imprint is a result of application, during emission, of the hash function to the data to be emitted.

12. The reception method according to claim 7, wherein the processing includes deconversion of 6-bit words to 8-bit words.

13. The reception method according to claim 7, wherein the transmission channel is a channel for exchange of data between an aircraft and a ground base.

14. A data emission device, comprising:

means for determining an authentication word for the data, the authentication word relating to the data before processing;

means for processing the data to obtain processed data, the means for processing including an encryption of the data and a compression of the encrypted data; and

means for emitting the processed data on a transmission channel.

15. The emission device according to claim 14, wherein the means for determining includes means for applying a hash function to the data.

16. A data reception device, comprising:

means for receiving data on a transmission channel;

means for processing the received data, the means for processing including a decompression of the received data and a decryption of the decompressed data; and

means for verifying authentication of the processed data.

17. The reception device according to claim 16, wherein the means for verifying includes means for applying a hash function to at least part of the processed data to obtain a calculated imprint, and means for comparing the calculated imprint with a received imprint.

18. An aircraft comprising:

a device including

a determining unit configured to determine an authentication word for the data, the authentication word relating to the data before processing,

a processing unit configured to process the data to obtain processed data, the process including an encryption of the data and a compression of the encrypted data, and

an emitting unit configured to emit the processed data on a transmission channel.