Private I: a New Column at Macworld

My inaugural outing as a columnist at Macworld appeared today under the name Private I. I'll be writing weekly about security and privacy as they relate to Mac and iOS users. How does new security exploit X affect you as a Mac OS X user? How does mobile hack Y reveal your location to advertisers? Oh, there's enough to fill a column every day, and I'll be hard pressed to pick a single notion a week.