WikiLeaks scrubs such documents to insure that no digital traces embedded in them can identify their source.
NEWYORKER: No Secrets
The digital traces that remain show that Tsarnaev added a "like" on several photos referring to Chechnya that were posted by other Instagram users.
CNN: SHARE THIS
We leave traces of ourselves behind constantly, thanks to all the convenient digital devices we use.
FORBES: We're all being tracked all the time. Is it necessary?
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