IDG News Service — The disturbing rash of data breaches in recent years has demonstrated that data security -- always a huge concern of CFOs -- affects every company and its customers. Entertainment sites, clothing retailers, grocers, financial services institutions are only the latest and most obvious of organizations to have had IT systems compromised, or sensitive information stolen.

Traditionally, of course, data protection falls mainly in the IT department's domain. But while CIOs may manage the Wi-Fi networks and servers that criminals target, CFOs approve IT spending, and are often responsible for handling repercussions of a breach. That suggests that they should have a lot to say about data security planning, too, to go with their deep involvement in dealing with the fallout -- from notifying the parties affected by breaches, to reporting on the financial consequences.

Further, CFOs should serve as facilitators in helping "business managers treat security as an economic requirement," said Jay Heiser, a Gartner research vice president whose focus areas include IT risk assessment and management. And that's something that finance people may do better than techies, because they're not security wonks.

Data breaches "can absolutely impact your bottom line," said Mike Dandini, head of the management and professional liability underwriting unit at The Hartford, the insurance giant. Cyberinsurance, he added, is the second most asked about management liability product these days.

"The real issue comes down to how much data to they store," he said. "Do they keep a lot of personally identifiable information. But also, for any company, your trade secrets, your proprietary information, all of that could be at risk. So from a CFO's perspective, that could impact revenues, good will, reputation and client trust. That all comes down to cost, whether its lost revenues, or whether it's remediation."

And the consequences of breaches at Sony, TJX Cos. and the Hannaford supermarket chain, to name just three, have illustrated just how costly they can be.

Sony, which suffered multiple data breaches across its online entertainment sites in April, initially estimated clean-up costs at least $171 million. It had to warn investors that the breach, which affected 101 million users and ranks as one of the largest to date, would have a sharp impact on its fiscal 2011 year. One major cost: the free year of identity-theft monitoring that the company is offering PlayStation Network and Qriocity users whose names, addresses, birth dates, purchase histories and online identifications were stolen.

The repercussions of an 18-month hack that began in July 2005 cost TJX, parent company of clothing chains TJ Maxx and Marshalls, $256 million. The retailer saw $118 million erased from its 2007 second-quarter profits to deal with the attack, during which hackers made off with 45.6 million credit and debit card numbers.

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