Secure transmission with error correcting code

摘要

The invention concerns a method and a system for encoding digital data (DATA) represented by source symbols, with an error correcting code generating parity symbols from, for each parity symbol, a plurality of source symbols and at least one parity symbol of preceding rank, including at least encrypting once (54) at least one first value (P1) into several encrypted values and integrating at least one combination (P1,j) of said encrypted values to compute (55) at least one part (P2 . . . Pn−k) of said parity symbols.

主权项

1. A method of encoding data, comprising:
ciphering, by a transmitter, mk of k source symbols using a first ciphering algorithm to generate a first set of mk enciphered symbols, where m<1; generating, by the transmitter, n−k parity bits using low density parity check coding based upon the first set of mk enciphered symbols and a remaining (1−m)k of the k source symbols without enciphering the (1−m)k remaining source symbols; and transmitting, by the transmitter, the n−k parity bits and mk enciphered symbols.