A method for transmitting and receiving data, in particular to secure exchange between the aircraft and ground-BASE, the appropriate device and an aircraft equipped with such facilities

摘要

1. A method of transmitting data, characterized in that it comprises the following steps:;determining (E20) an authentication word (E) of the data (M);;processing (E22, E24, E26) the data to obtain processed data (G), wherein the compression treatment comprises the step (E24);;transmitting (E28) processed data (G) over the communication channel (C_T, FROM_A).;2. The transmission method of claim 1, wherein the step of determining (E20) comprises applying a hashing function (H) for the data (M).;3. The transmission method of claim 2, wherein applying the hash (H) functions use the cryptographic key (K).;4. The transmission method of claim 3, wherein the encryption processing comprises the step (E22) applied to the data (M) and the authentication word (E).;5. The transmission method of claim 1, wherein the processing step includes encrypting (E22).;6. The transmission method according to claim 5, wherein the encryption step (E22) is used for data (M) and the authentication word (E).;7. The transmission method of claim 1, wherein the processing comprises the step (E26) of converting 8-bit words in the word of 6 bits.;8. The transmission method according to one of claims 1-7, wherein the communication channel (C_T, FROM_A) Is the channel communication between the aircraft (A) and a ground base (B).;9. A method for receiving data, characterized in that it comprises the following steps:;receiving (E30) the data (G ') through the communication channel (C_T, FROM_A);;processing (E32, E34, E36) of the received data (G '), wherein the processing step comprises decompressing (E34);;checking (E38, E40) authentication processed data (M ').;10. The receiving method of claim 9, wherein the checking step comprises the following steps:;calculating (E38), print (E "), at least a portion (M ') of the processed data (M', E ');;comparing (E40) the calculated fingerprint (E ") to the received fingerprint (E ').;11. The receiving method of claim 10, wherein the step of calculating (E38), print (E ") comprises the step of applying a hashing function (H) for said portion of data (M ').;12. The receiving method of claim 11, wherein applying the hash (H) functions use the cryptographic key (K).;13. The receiving method of claim 11, wherein the received fingerprint (E ') is the result of a hashing function in the transmission (N) for the transmission (M).;14. The receiving method of claim 9, wherein the processing comprises decoding (E36).;15. The receiving method of claim 9, wherein the processing step comprises reverse mapping (E32) word of 6 bits in a word of 8 bits.;16. A method of receiving one of pp.9-15, wherein the communication channel (C_T, FROM_A) Is the channel communication between the aircraft (A) and a ground base (B).;17. The data transmission device, characterized in that it comprises:;means for determining an authentication word (E) of the data (M),;data processing means (M) for receiving the processed data (G), wherein the processing means comprises compressing means,;means for transmitting the processed data (G) over the communication channel (C_T, FROM_A).;18. An apparatus according to claim 17, wherein the determining means comprise means of applying a hashing function (H) for the data (M).;19. An apparatus according to claim 17 or 18, wherein the processing means comprises encryption means.;20. The data receiving device, characterized in that it comprises:;data receiving means (G ') through the communication channel (C_T, FROM_A);received data processing means (G '), wherein the processing means comprise decompression means,;means of verifying the authentication of the processed data (M ').;21. The reception apparatus of claim 20, wherein the verification means comprise means of applying a hashing function (H) of at least a portion of the processed data (M ') to obtain a printout of the calculated (E ") and comparing the calculated print means (E" ) with the received fingerprint (E ').;22. The reception apparatus of claim 20 or 21, wherein the processing means comprises deciphering means.;23. An aircraft comprising a device according to one of pp.17-22.