Mariko Fujimoto joined NEC Solution Innovators, Ltd. in 2004 and worked for development of software and systems for internal control. In 2015, she joined Watch and Warning Group of JPCERT/CC, where she was engaged in information gathering and early warning activities. Now as a Project Researcher of Secure Information Society Research Group, the University of Tokyo, she is engaged in research on cyber security especially log analysis for detecting targeted attacks.