METHOD AND SYSTEM FOR GUARANTEEING THE INTEGRITY OF AT LEAST ONE SOFTWARE PROGRAM WHICH IS TRANSMITTED TO AN ENCRYPTION/DECRYPTION MODULE AND RECORDING MEDIA FOR IMPLEMENTING SAME

摘要

The invention relates to a method of guaranteeing the integrity of at least one computer software program transmitted by a transmitter to a decoder which is equipped with an encryption/decryption module by means of a long-distance information transmission network. The inventive method consists in inserting (at 52) a supplementary piece of information into a message containing the information necessary for the decoder to decrypt the information signals transmitted by the transmitter, said supplementary information enabling the encryption/decryption module to verify that it has effectively received each computer software program transmitted.