In-light encryption/decryption system for data distribution

摘要

The invention concerns an in-flight encryption/decryption system for data distribution. It generally concerns the field of data transmission of all types in digital form using packet-data encoding consisting of data routed in blocks in a network, and in particular the distribution of encrypted data by satellite. To accelerate the key-exchanging period, the keys are not distributed on a channel parallel to the data channel but inside the very data, encrypted then transmitted in the form of packets (12) containing each a key (14) and useful data (15) encrypted with said key, the latter capable of being changed for each packet and being recovered in reception by a specific hardware or software element.