Sistema de gerenciamento de chaves públicas baseado em virtualização para redes ad hoc móveis
MANETs (Mobile Ad Hoc Networks) are wireless networks without infrastructure that are dynamically established, without the need of a centralized administration. Due to distributed routing in these kind of networks and also due to wireless media, Ad Hoc networks may present all security problems existing in conventional networks and also new and challenging security problems. The usage of cryptography is the main technique to assure the secure data transferring in a network. In asymmetric cryptographic systems, nodes use a key to code a message and another key to decode a same. The task of managing these keys is performed by a Key Management System, that defines the issue, the storage, the distribution, the protection and the revocation of them. This work presents a new Key Management System based on Virtualization. In this system, called Virtual Key Management System (VKM), is used a virtual structure, without any relation to the physical coordinates of the nodes, to establish the confidence between themselves. Therefore, nodes follow the rules established by this virtual structure to perform the issue, the storage, the distribution, the protection and the revocation of the public and the private keys in the network. The VKM is 100% resilient against Creation of Fake Identity attacks. When comparing to the Self-Organized Public Key Management (PGP-Like), the VKM shows better resiliency against attacks of Personification and the same resiliency against attacks of Lack of Cooperation. When comparing to the Group-based Key Management (GKM), the VKM shows higher resiliency against Creation of Fake Identity attacks, once it is 100% resilient to this kind of attack. The Virtual Routing Protocol (VRP) and the Virtual Distance Vector (VDV) are two hybrid routing protocols that makes usage of a virtual structure to define the proactive part of the routing. This work also shows that the impact created with the implementation of VKM in these routing protocols are the decrease of the data delivery ratio, the increase of the delay and the increase of the network overhead.