All contracts vary in terms, but I've never seen an NDA that says "you can talk about the content under NDA as long as you don't mention the businesses name, and just identify who they are in a roundabout way instead".

"Well i'm under an NDA, so I can tell you all the specifics of the project, but I can't tell you the companies name. I can say they own the largest search engine though, and have a market cap of 1.5 trillion, and rhyme with "Roogle", but I really can't say who they are. Anyway, here is some code I wrote for them and a description of how we nearly ruined their project along with me calling them incompetent..."