Abstract Mobile and wireless devices become more popular and their capabilities increase as well. At the same time, most of the today's PC power is unused, as a study of the Gartner Group indicates. Grid computing and P2P systems take advantage of this fact and provide unused resources to other nodes within the network, but mobile scenarios or ad hoc networks are often left out. This paper presents a concept for secure resource sharing in mobile ad hoc networks, with a special focus on challenges and problems with mostly unknown and potentially unreliable and untrustworthy devices. Virtualization technologies will be presented as a solution to grant application security, as they are also used in grid and trusted computing. The secure resource sharing (SRS) system, that will be presented in this paper as well, focuses on granting security aspects like availability, privacy, confidentiality and trust establishment in the area of resource sharing.