PROCÉDÉ MIS EN UVRE PAR ORDINATEUR POUR LE CODAGE DE CORRECTION D'ERREUR ET LE CHIFFREMENT D'UN FICHIER

摘要

The invention relates to a computer-implemented method for error-correction-encoding and encrypting of a file. The file is split (S1) into at least two blocks (C1, C2). The first block (C1) is encrypted (S2) using a given encryption key (K). The encrypted first block (C1*) is encoded twice (S3) using a first and second forward error correction code (FEC11, FEC12) of the first block. Each subsequent block (Ci) is encrypted (S4) by performing an algebraic operation. The encrypted block (Ci*) is encoded twice (S5) using a first and second forward error correction code for this block, wherein a cryptographic indexing function provides a set of indices used by the second forward error correction code to produce the second encoded chunk (Ci2'). The first encoded chunks (C11', Ci1') of each encrypted block (C1*, Ci*) are outputted (S6). The computer-implemented method enables secure transmission of a file content between low power devices.