Resilient SDN, CDN and ICN Technology and Solutions

Disaster-based resilience issues can severely interrupt communication in networks, making their functions unavailable. Such interruptions may include hardware-/software- related failures or malicious attacks. Especially, the latter is becoming more and more visible with higher intensity and more massive scale. In order to prevent it, new technology concepts and new mitigation strategies are needed. In this chapter, we present the most common cyber-attacks that affect networks based on the concepts of the software defined network (SDN), the content delivery network (CDN) and the information-centric network (ICN). We then indicate solutions to these problems. Finally, we discuss the future opportunities of how the communication networks can be updated to decrease the topological vulnerability to attacks

Color Changes Induced by Pigment Granule Aggregation in Chromatophores: A Quantitative Model Based on Beer\u27s Law

A model is presented that quantitatively relates changes in the Beer\u27s Law absorbance of light-absorbing chromatophores (melanophores, erythrophores and xanthophores) of cephalopods to changes in the extent of pigment granule aggregation in these cells. Assuming a circular chromatophore of uniform thickness is initially in its dispersed state, and using a pigment granule aggregation index (PGAI) that specifies the extent of pigment granule aggregation, we find that for a given PGAI, the increase in the photon flux through the chromatophore induced by pigment granule aggregation is directly proportional to the dispersed state absorbance. That is, for a given PGAI, darkly colored chromatophores experience greater clearing responses than weakly colored chromatophores. Color changes are also found to be induced as effectively by a small number of large chromatophores or a large number of small chromatophores provided the total skin surface area covered by pigment in the dispersed states are equivalent in the two cases. These results are related to the morphologies and pigment aggregation behaviors of melanophores, erythrophores and xanthophores, based on the light absorption properties of the melanin, pteridine and carotenoid pigments found in these cells. The relative utility and limitations of this model for studying cephalopod (nonden-dritic) and vertebrate (dendritic) chromatophores are also discussed

On the Scientific Maturity of Digital Forensics Research

Part 1: THEMES AND ISSUESInternational audienceThis paper applies a scientific maturity grade schema from the software engineering domain to research in the field of digital forensics. On the basis of this maturity schema and its grades, the paper classifies the current maturity of digital forensics research. The findings show that much more research conducted at higher levels of “scientificness” is necessary before the new field of digital forensics can be considered to be scientifically mature