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Stateless security filtering of optical data signals: An approach based on code words

In this paper, we propose an optical stateless filtering architecture which allows the traffic filtering at the optical layer. Indeed, each traffic stream will be identified by a unique identifier composed of a set of code words. In the core node, a set of optical filtering rules will be applied to this traffic stream based on its corresponding identifier in order to accept or reject the traffic stream. The stateless filtering process is based on the logical comparison between the received traffic identifier and the optical filtering signal which are composed of a set of code words. The proposed architecture is composed by two main components. The first component is an encoder implemented in the edge node, which generates traffic stream identifiers. And, the second component is the optical stateless filtering module which is implemented in the core node.