In 2011, InfoLawGroup began its "Legal Implications" series for social media by posting Part One (The Basics) and Part Two (Privacy). In this post (Part Three), we explore how security concerns and legal risk arise and interact in the social media environment.There are three main security-related issues that pose potential security-related legal risk. First, to the extent that employees are accessing and using social media sites from company computers (or increasingly from personal computers connected to company networks or storing sensitive company data), malware, phishing and social engineering attacks could result in security breaches and legal liability. Second, spoofing and impersonation attacks on social networks could pose legal risks. In this case, the risk includes fake fan pages or fraudulent social media personas that appear to be legitimately operated. Third, information leakage is a risk in the social media context that could result in an adverse business and legal impact when confidential information is compromised.