Churn Resistant de Bruijn Networks for Wireless on Demand Systems
Résumé
Wireless on demand systems typically need authentication, authorization and accounting (AAA) services. In a peer-to-peer (P2P) environment these AAA-services need to be provided in a fully decentralized manner. This excludes many cryptographic approaches since they need and rely on a central trusted instance. One way to accomplish AAA in a P2P manner are de Bruijn-networks, since there data can be routed over multiple non-overlapping paths, thereby hampering malicious nodes from manipulation that data. Originally, de Bruijn-networks required a rather fixed network structure which made them unsuitable for wireless networks. In this paper we generalize de Bruijn-networks to an arbitrary number of nodes while keeping all their desired properties. This is achieved by decoupling link degree and character set of the native de Bruijn graph. Furthermore we describe how this makes the resulting network resistant against node churn.