When a chap called Matt noticed his Bluetooth headphones wouldn't switch to his phone, he was surprised to realise the reason was a single AliExpress webpage sitting open in his browser - playing nothing at all, at zero volume. And yet somehow his hardware could hear it. Audio fingerprinting is one of the sneakiest tracking tricks on the web. Meanwhile, the intelligence agencies of the "Five Eyes" (not Five Guys) have got together and published advice on how companies should communicate after a cyber attack. The summary? For the love of God, stop calling every breach "sophisticated." All this and more in episode 484 of the "Smashing Security" podcast with cybersecurity expert and keynote speaker Graham Cluley, and special guest Danny Palmer.