Technology-related disasters:a survey towards disaster-resilient software defined networks

Resilience against disaster scenarios is essential to network operators, not only because of the potential economic impact of a disaster but also because communication networks form the basis of crisis management. COST RECODIS aims at studying measures, rules, techniques and prediction mechanisms for different disaster scenarios. This paper gives an overview of different solutions in the context of technology-related disasters. After a general overview, the paper focuses on resilient Software Defined Networks

Artificial intelligence (AI) methods in optical networks: A comprehensive survey

Producción CientíficaArtificial intelligence (AI) is an extensive scientific discipline which enables computer systems to solve problems by emulating complex biological processes such as learning, reasoning and self-correction. This paper presents a comprehensive review of the application of AI techniques for improving performance of optical communication systems and networks. The use of AI-based techniques is first studied in applications related to optical transmission, ranging from the characterization and operation of network components to performance monitoring, mitigation of nonlinearities, and quality of transmission estimation. Then, applications related to optical network control and management are also reviewed, including topics like optical network planning and operation in both transport and access networks. Finally, the paper also presents a summary of opportunities and challenges in optical networking where AI is expected to play a key role in the near future.Ministerio de Economía, Industria y Competitividad (Project EC2014-53071-C3-2-P, TEC2015-71932-REDT

Real-Time Energy Price-Aware Anycast RWA for Scheduled Lightpath Demands in Optical Data Center Networks

The energy consumption of the data center networks and the power consumption associated with transporting data to the users is considerably large, and it constitutes a significant portion of their costs. Hence, development of energy efficient schemes is very crucial to address this problem. Our research considers the fixed window traffic allocation model and the anycast routing scheme to select the best option for the destination node. Proper routing schemes and appropriate combination of the replicas can take care of the issue for energy utilization and at the same time help diminish costs for the data centers. We have also considered the real-time pricing model (which considers price changes every hour) to select routes for the lightpaths. Hence, we propose an ILP to handle the energyaware routing and wavelength assignment (RWA) problem for fixed window scheduled traffic model, with an objective to minimize the overall electricity costs of a datacenter network by reducing the actual power consumption, and using low-cost resources whenever possible

Formal Validation of Security Properties of AMT's Three-Way Handshake

Multicasting is a technique for transmitting the same information to multiple receivers over IP networks. It is often deployed on streaming media applications over the Internet and private networks. The biggest problem multicast introduces today is that it is an all or nothing solution. Every element on the path between the source and the receivers (links, routers, firewalls) requires multicast protocols to be enabled. Furthermore, multicast has a conceptual business model, and therefore is not an easy case to make. These factors, embedded deep in technology, but ultimately shaped by economics, led to a lack of multicast deployment. To address this problem, the AMT (Automatic IP Multicast without explicit Tunnels) specification has been developed by the Network Working Group at the IETF. This specification is designed to provide a mechanism for a migration path to a fully multicast-enabled backbone. It allows multicast to reach unicast-only receivers without the need for any explicit tunnels between the receiver and the source. We have formally validated the three-way handshake in the AMT specification using AVISPA against two main security goals: secrecy and authentication. We have demonstrated that the authentication goal is not met: an attacker can masquerade as an AMT relay, and the AMT gateway (at the end user) cannot distinguish a valid relay from an invalid one. Another attack was also found where an intruder can disconnect or shutdown a valid session for a valid end-user using a replay attack