Method to enciphering/deciphering data packets of a data steam

process encryption of data packets of a data stream in which to a Encrypting Data packet automatically sequentially successive in at least two encryption levels encoded is comprising the following steps: - (S10) determining number, Nature and sequence of the consecutive encryption levels to use different coding algorithms; - (S12) Determining in the successive encryption levels to use different coding keys; - (S13) Assigning each one coding key each to one coding algorithm in each case an encryption level; and - (S16, S17) sequentially encrypting to encrypt a Data packet in at least two subsequent encryption stages, a multiple encrypted to receive data packet.