ISEC was held in Keio University Hiyoshi Campus in the period of March 1st, 2012 to March 2nd, 2012. This time, it is combined with Technical Committee on Information Theory (IT) and Technical Committee on Wideband Systems (WBS). The number of presentations was 62 (ISEC: 18, Invited-speech: 3). There are 3 venues, and attendance was about 30. The conference covered a wide range of topics from object verification system based on printed ink spread, to multivariate public key cryptosystem, etc. The conference was very interesting.