The document summarizes the work of the TeraGrid Security Working Group, including developing security policies, coordinating incident response, and current/future projects. Key points include: - The WG coordinates secure and rapid response to security incidents across TeraGrid resource providers. - Incident response activities include weekly conference calls to share information, a 24/7 security hotline, and a standardized incident response playbook. - Current projects focus on risk assessments, science gateway security, user portal security, and integrating with external security groups. - Future work includes improving incident tracking, using science gateway attribute data to help with response, and preparing for the transition to Extreme Digital.