BY YASUYUKI SASAKI STAFF WRITER
LAC Co.'s Cyber Security Laboratory monitors a possible attack on a corporate client around the clock. (Shiro Nishihata)
Editor's note: Yasuyuki Sasaki, who contacted a Maritime Self-Defense Force member who posted personal opinions and unpublished information about his missions on his Twitter and Facebook accounts, talked with experts about the potential risk of social media on defense systems.