The former Deputy Director of the NSA (Chris Inglis) is reputed to have said that “if we were to score cyber the way we score soccer, the tally would be 462-456 twenty minutes into the game, i.e., all offence”. A quick look at conference line ups (or the evening news) supports this claim. For a long time, team offence has grabbed the lion’s share of both headlines and talent, causing more and more people to turn into full-time security nihilists.