Passage: At a press conference held by Bruce Wayne to declare his opposition to Arkham City, TYGER mercenaries arrest and imprison him in Arkham City. Hugo Strange discloses his knowledge of Wayne's dual identity as Batman before releasing him into the prison's criminal populace. While Strange prepares to commence "Protocol 10", Wayne obtains his equipment via airdrop from Alfred Pennyworth, allowing him to become Batman. He first saves Catwoman from being executed by Two-Face, who hopes to gain respect by murdering her. After Joker attempts to assassinate Catwoman, Batman tracks him to his hideout in the Sionis Steelmill, believing Joker may know the truth behind Protocol 10.There, Batman learns that the unstable properties of the Titan formula are mutating in Joker's blood, gradually killing him. Joker captures Batman and performs a blood transfusion on him, infecting him with the same fatal disease. Joker also reveals that Gotham hospitals have been poisoned with his infected blood. Desperate to save himself and innocent citizens, Batman seeks out Mr. Freeze, who had been developing a cure but has since been kidnapped by the Penguin. Tracking Penguin to the Cyrus Pinkney National History Institute, Batman defeats his forces, his imprisoned monster Solomon Grundy, and ultimately the Penguin himself, before liberating Mr. Freeze.Freeze tells Batman that he has created a cure, but it is rendered useless via instability. Batman deduces that the restorative properties of Ra's al Ghul's blood can complete the cure and tracks one of his assassins to his underground lair, leading Batman into a confrontation with Ra's and his daughter Talia, Batman's former lover. With Ra's al Ghul's blood, Freeze is able to develop an antidote, but it is stolen by Harley Quinn before Batman can use it. When Batman returns to the Joker, he finds his health has been restored.

Question: Who knows that Bruce Wayne is Batman?
Hugo Strange