Internet security threat report 2013: appendix, Symantec corporation Appendix::A – Threat activity trends Appendix::B – Malicious code trends Appendix::C – Spam and fraud activity trends Appendix::D – Vulnerability trends DSWeb(http://dymamicalsystems.org/) magazine April issue news 제4회 KISTEP 우수 연구논문 공모 논문제안서 접수 마감: 15 May 2013 Serious game Serious Games Initiative Website: http://www.seriousgames.org/