I cannot believe the link between palantir and prism is by the mere NAME of the software package as alleged in this article. That's some weak journalism. I mean, just check out github while you're at it:
https://github.com/search?q=PRISM&ref=cmdform
The company readily admits that their software has primarily been used in the defense and finance industries. They don't hide this fact, nor should they feel pressured to.
I'm not crucifying anybody, I was just pointing out that the OP's speculation was based on slightly more than just the name alone (but I agree, it's still pretty weak).