The stated purpose is to entrap whistleblowers, which is bad enough, but doing so by feeding them misinformation means feeding it to the rest of us too.
Wired:
[1]
Pentagon-funded researchers have come up with a new plan for busting leakers: Spot them by how they search, and then entice the secret-spillers with decoy documents that will give them away.
Computer scientists call it it “Fog Computing” — a play on today’s cloud computing craze. And in a recent paper [2] for Darpa, the Pentagon’s premiere research arm, researchers say they’ve built “a prototype for automatically generating and distributing believable misinformation … and then tracking access and attempted misuse of it. We call this ‘disinformation technology.’”
Two small problems: Some of the researchers’ techniques are barely distinguishable from spammers’ tricks. And they could wind up undermining trust among the nation’s secret-keepers, rather than restoring it.