\u201cSecurity\u201d means different things to different organisations; for proof you need look no further than the disparate collection of security chiefs featured in this issue.For Commonwealth Bank head of security John Geurts, security means thwarting armed robbers and ensuring the safety of the bank\u2019s employees. For Starbucks CSO Francis D\u2019Addario, security means balanced cash registers in cafes all over the world. For Mike Hager, who was vice president of security at OppenheimerFunds when the company\u2019s offices were destroyed on September 11, security is about business continuity planning and the ability to recover systems quickly in the event of a disaster. For Mike Arnavutian, head of security strategy at BT Global Services, security is an ASP that guards his company data as closely as he does.And yet while every company\u2019s security road map is different, some challenges remain constant, like aligning security with the business and protecting critical information infrastructure. Another is the inevitable tension between good security practices and delivering quality service to your customers.\u201cWe work very hard to keep examining and refining our systems to make sure they\u2019re as good as they can be, but you can\u2019t throw customer service out the window \u2014 so it\u2019s a trade-off,\u201d the Commonwealth Bank\u2019s Geurts told me when I interviewed him for this month\u2019s cover story.That trade-off is a challenge that all CSOs recognize, no matter what business they\u2019re in. Geurts knows that good security is not only about creating a safe and secure work environment, it is also about creating a profitable one. Not surprisingly, he also says that improving business acumen should be a top priority for most security professionals.To that end, we\u2019ve asked CSOs, security experts and researchers to share their perspectives on the current state of IT security. Security has taken centre stage in our society, whether we like it or not, and it\u2019s the CSO\u2019s job to help companies navigate a course through this treacherous new business landscape. CSO magazine is here to help you plot where you are, predict what the future holds for technology, and find out where the bad guys hide. ?