Who is responsible for protecting physical security systems from cyber-attacks? It’s a question that continues to engage debate, as the majority of new physical security devices being installed are now connected to a network. While this offers myriad benefits, it also begs the question: Who is responsible for their cyber security? James Willison explores the various opinions in the sector following the results of a recent poll on the subject. In recent years it has become more obvious that physical security systems are dependent on IT and vulnerable to cyber-attacks. In 2007, the movie Die Hard 4.0 showed how a group of criminals were able to control traffic systems and bring Washington D.C and the stock market to a standstill. In the film, ‘Johnny English Strikes Again’ (2018) all the trains in the UK are directed to Bristol.