Patent ID: 7403622
Filing Date: 2008-07-22
Classification: H04L,H04N

Abstract:
1. Process of symmetric key management in a communication network comprising: a device of a first type furnished with a source of data to be broadcast over the network and at least one device of a second type intended to receive said data, the process comprising the steps of: (a) by the device of the first type, determination of a first symmetric key, encryption of the first symmetric key to produce an encrypted first symmetric key, and transmission of the encrypted first symmetric key to said at least one device of the second type; (b) by said at least one device of the second type, reception of the encrypted first symmetric key, decryption of the encrypted first symmetric key to recover the first symmetric key, encryption of said first symmetric key with the aid of a second symmetric key to produce a second symmetric key encrypted first symmetric key, said second symmetric key known to the said at least one device of the second type of the network, and transmission of said second symmetric key encrypted first symmetric key to the device of the first type; (c) by the device of the first type, reception and storage of said second symmetric key encrypted first symmetric key.