Revocable credentials. Another approach is to build credentials that can be revoked in the event of bad behavior. This requires a procedure such that when a particular anonymous user does something bad (posts spam, runs a DOS attack against a website) you can revoke that specific user’s credential — blocking future usage of it, without otherwise learning who they are.
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McFarland didn't know what was on the 10 rusty reels he dropped off at the Library of Congress' National Audio-Visual Conservation Center in Culpeper, Va. A Library article about the discovery describes the battered, pre-World War I artifacts as having been, "shuttled around from basements to barns to garages," and that they, "could no longer be safely run through a projector," owing to their delicate condition. "The nitrate film stock had crumbled to bits on some; other strips were stuck together," the article said. It was a lab technician in Michigan who suggested McFarland contact the Library of Congress.
Rebecca Morelle,Science Editorand
Trade between the EU and two South American countries may start within two months under a provision application of the Mercosur deal.