"Indonesian Community for Hacker and Opensource" or better known as ECHO is and Independent and Non-Profit Computer Security Organization which has a large amount of member and often doing group or independent security research, publish security article and security advisories Echo also doing offline meeting such as gathering, seminar and organize security events in Indonesia. Including: - Main Site: http://echo.or.id - Indonesian Base Security Forum : http://forum.echo.or.id - Indonesian Base Electronic Hacking Magazine : http://ezine.echo.or.id - Indonesian Base IT Security Mailing List: http://newbie.echo.or.id