I'm not a computer professional, but really enjoy his show, like the episode about Belgicon, or the Penetration Disaster episode. I'm asking here because, I'm trying to find the episode where the guest, at the very end, in response to Jack's probing questions, sort of hints that NSA may have a 'back door' (sorry if that's not the correct term in this case) into bitcoin. Does anyone know which episode that may have been? Thank you for any help.