In response to a controversial Web site that exposes the identities of criminal defendants who have agreed to cooperate with authorities, the federal judges on the Eastern District of Pennsylvania bench have adopted a plan designed to make it impossible for any visitor to the court’s Web site to discern whether a defendant is cooperating.

The new protocol, adopted last week, is a direct response to the Who’s a Rat Web site, at www.whosarat.com, and will result in a modification of the docketing of all sentencing and plea documents in all criminal cases.