Ad hoc networks are autonomous dynamic networks composed of mobile devices like personal digital assistants (PDA) for instance. In such mobile networks, lack of infrastructure leads to non trivial information discovery and dissemination. A scheme in which a unique object centralizes information is not efficient for many reasons. In this paper, we propose a probabilistic algorithm to satisfactorily distribute an information token among nodes forming the network by using localized datas. Then, in order to limit the number of memorizing nodes, we propose to make memorize nodes belonging to a dominating set