Joint Content Placement and Secure Lightpath Provisioning in EONs Supporting Anycast Traffic

This work considers secure lightpath establishment and content placement in elastic optical networks (EONs). Security of confidential connections against eavesdropping attacks is ensured through network coding among confidential and non-confidential unicast or anycast lightpaths. A unicast connection requires a lightpath establishment from a specific source to a destination, whereas, for an anycast connection, the source can be chosen from a specific set of network nodes (data centers) where the content can be located at. To address this problem, a heuristic algorithm is developed that considers the different types of connections to be established, with the objective to maximize the security level of the confidential connections, while source node selection and content placement are performed for the anycast connections. Performance results demonstrate that anycast connections significantly improve the security level of confidential connections with no additional spectrum requirements, compared to the scenario where only non-confidential unicast connections are used for security purposes.