Factors Impacting Key Management Effectiveness in Secured Wireless Networks

The use of a Public Key Infrastructure (PKI) offers a cryptographic solution that can overcome many, but not all, of the MANET security problems. One of the most critical aspects of a PKI system is how well it implements Key Management. Key Management deals with key generation, key storage, key distribution, key updating, key revocation, and certificate service in accordance with security policies over the lifecycle of the cryptography. The approach supported by traditional PKI works well in fixed wired networks, but it may not appropriate for MANET due to the lack of fixed infrastructure to support the PKI. This research seeks to identify best practices in securing networks which may be applied to new network architectures

Energy-Efficient Secure Routing in Wireless Sensor Networks

Wireless sensor networks can provide low cost solution to verity of real-world problems. Sensors are low cost tiny devices with limited storage, computationalcapability and power. They can be deployed in large scale for performing both military and civilian tasks. Security will be one of the main concerned when they will be deployed in large scale. As sensors have limited power and computational apability, any security mechanism for sensor network must be energy e±cient and should not be computationalintensive. In this thesis we propose an energy-e±cient secure routing for wireless networks based on symmetric key cryptography. The proposed crypto system is session based and the session key is changed after the expire of each session. We divide the network into number of clusters and select a cluster head within each cluster.Communication between sensor and the sink takes place at the three level; sensor! cluster-head ! sink. Encryption of the sensed data is ransmitted to the cluster head, which aggregated the data received from the sensor nodes of its cluster before forwarding to the next cluster head on the path or to the sink . Sensors do not participate in the routing scheme; their energy is conserved at each sensor node

European Avant-Garde: Art, Borders and Culture in Relationship to Mainstream Cinema and New Media

This research analyses the impact of transformation and hybridization processes at the intersection of art, science and technology. These forms of transformation and hybridization are the result of contemporary interactions between classic and digital media. It discusses the concept of 'remediation' presented by Bolter and proposes the concept of 'digital ekphrasis,' which is based on Manovich' s analyses of the interactions between classic and digital media. This is a model which, borrowed from semiotic structures, encompasses the technical as well as aesthetic and philosophical transformations of contemporary media. The thesis rejects Baudrillard's and Virilio's proposed concepts of 'digital black hole' as the only possible form of evolution of contemporary digital media. It proposes a different concept for the evolutionary model of contemporary hybridization processes based on contemporary forms of hybridizations that are rooted in aesthetic, philosophical and technological developments. This concept is argued as emancipated from the 'religious' idea of a 'divine originated' perfect image that Baudrillard and Virilio consider to be deteriorated from contemporary hybridization experimentation. The thesis proposes, through historical examples in the fine arts, the importance of transmedia migrations and experimentations as the framework for a philosophical, aesthetic and technological evolutionary concept of humanity freed from the restrictions of religious imperatives