Smart phones are poised to become the next major security challenge for businesses.

For now, a good rule of thumb for on-the-go workers is: "If you don't need to do it, don't do it," said Aaron Cohen, chief executive of The Hacker Academy, a Chicago-based firm that provides security training for companies and government agencies. Cohen warned against idly checking e-mail or opening sensitive documents on a hand-held device -- unless it's absolutely necessary.

At the Chicago Tribune.

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