The 13th Domestic conference entitled Information and Communication System Security, ICSS2010, was held at Hiroshima City University on November 5, 2010. There were about 20 participants and 12 presentations in total. The topics included were mainly system security, e.g., Key distribution in wireless sensor network, Ontological Approach toward Cybersecurity in Cloud Computing, Network Topology Analysis for Web Malware Risk Assessment, and so on. In the social banquet, delicious Hiroshima-local Sake is provided.