Thales

Renaud Dubois

Eric Garrido

Mathieu Morel

Sandrine Agagliate

Paul Gompel

David Lefranc

Olivier Bernard

Valentin Mascre

Simon Masson

Olivier Orciere

Anne-Rose Gratadour

Alexandre Anzala Yamajako

Method of identifying a protocol at the origin of a data flow. The method of identifying a protocol giving rise to a packet flow comprises the following steps: &#x2014;a capture of the flow of the protocol to be identified, &#x2014;statistical classification of the flow, comprising an extraction of the classification parameters and a comparison of the classification parameters with statistical models constructed during a learning phase. The statistical classification comprises: &#x2014;a first phase of global statistical classification; and &#x2014;a step of synthesis of the results of the first and second classification phases so as to identify the protocol giving rise to the flow.

Method of identifying a protocol giving rise to a data flow

The invention relates to a method for broadcasting data in a system using a BES (A) stateless scheme using a binary tree T with a KEKs No 2 key structure, i.e. such that a key kis associated with each difference of subsets S, and a root key kassociated with the set of the tree T and a BES (A) 'stateful' scheme using the same binary tree T with a KEKs No 1 key structure, i.e. such that a key kis associated with each subtree Swherein the scheme (A) is used for the current broadcast session and the keys known by the denied users are updated with a 'stateful' scheme (A) from time to time.

Hybrid method for distributing keys for the diffusion of encrypted data

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GENNEVILIERS, France

Renaud Dubois