The invention concerns a method for securing a data packet stream involving the following steps: arranging the packets to be sent in a matrix of D rows and L columns; to each row and each column of the matrix, applying an error correction function, the result of which is a correction packet; then sending the resulting correction packets in addition to the data packets. The invention also relates to an articulated vehicle with a steering device. Moisture is effectively prevented from seeping into the edge of the chip by forming the anti-moisture-absorption film at the edge of the chip using the conventional processes of manufacturing the integrated circuit chip without an additional process.