"hit them until they tell you"
Reminds me of the xkcd skit on the same subject:
http://xkcd.com/538/
Holes created in light can hide data beyond the wit of any thief, who won't even know it's there thanks to the latest temporal cloaking technique. Or so we're told. The idea here is to split light, with its wavering signal, into component wavelengths, then offset those wavelengths such that they cancel each other out. Anyone …
I think you meant to say: follows on from the concept as proposed by McCall et al in J. Optics (2010/11), followed up by an experiment at Cornell (published in Nature 2012).
And re "but when it comes to security the ability to drop one's data into a time hole isn't quite as useful as it sounds cool" -- what, sounding cool isn't a useful thing? I mean, it got you to report on it, didn't it? :-)