Abstract: “Since the introduction of smart phones, people are now able to connect to the Internet anytime and anywhere. With the emergence of smart phones, the quality of life has greatly improved in a positive way, but it has also caused negative effects as well. The main problems are the increase of financial crimes such as Phishing and SMishing. At present, it is hard to find studies that proves the reduction of crimes through the security related knowledge sharing at SNS(Social Network Service). The purpose of this study is to find out factors that encourages people to actively share security-related information to SNS users via the Internet. According to the result, people with knowledge provision self-efficacy has a greater degree of self-expression. It is also found that the awareness of information security and personal social factors (self-expression and sense of belonging) have a meaningful influence on the security related knowledge sharing intention on SNS. On the contrary, it showed”

Keywords: SNS, Information Security, Knowledge sharing, Social identity, Security awareness