EghtesadOnline: Sony. Netflix. And now, HBO. While the 2014 hacking at Sony Pictures pushed entertainment giants to take computer security more seriously, recent incidents have exposed weaknesses throughout Hollywood’s food chain . Last week, as HBO investigated a cyberattack on its own systems, an unaired episode of its hit show “Game of Thrones” appeared online following an unrelated breach at a pay-TV partner in India. In April, when 10 episodes of Netflix Inc.’s “Orange Is the New Black” leaked, the incident was traced to a contractor.