I guess geofencing has really arrived. It already has its first security flaw.

That geofencing feature that Flickr rolled out yesterday could have a big flaw. You can restrict geotagging codes on pics, but if someone downloads the picture and looks at the EXIF data, there's a possibility that all the restricted info could come rushing back. More and more cameras, especially smartphones, geotag pictures when they're taken.

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John Moe is the host of Marketplace Tech Report, where he provides an insightful overview of the latest tech news.

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