Is this how the NSA 'leaker' was tracked down so quickly? Series of nearly-invisible yellow dots on the leaked document revealed exactly when and where it was printed

A series of 'tracking dots' that were inadvertently published by The Intercept on leaked documents could have led to the arrest of an NSA contractor. 

Reality Leigh Winner, 25, a Georgia security contractor with top secret clearance, was arrested and charged with leaking documents on Monday as NBC linked her to pages published by The Intercept.

Now, blog Errata Security has revealed how a series of nearly-invisible yellow dots that appeared at the top of the leaked pages would have allowed security services to track the leaker down with ease.

The leaked documents seemed to show Russia carried out cyber attacks on companies which produce software used during elections.

Read more: http://www.dailymail.co.uk/new...r.html#ixzz4jHQtfxPH