In case of a large scale disaster such as the Great East Japan Earthquake, many people may not be able to get disaster and emergency information because of heavy traffic congestion, serious damage and/or power cable cutoff of base stations, backhaul cable cutoff, etc. In many cases, private information needs to be sent through secured communication channels to designated recipients and people who evacuated to remote areas. In this paper, the development of secured information service platforms is presented. This development is one of R&D subjects of 'the disaster-resilient multilayered communications network' proposed by Tohoku University, KDDI Corporation, KDDI R&D Laboratories, and OKI Electric Industry. The development will be carried out in collaboration with NICT (National Institute of Information and Communications Technology) and YRP (Yokosuka Research Park).