In a world where texts, tweets and emails can potentially be used against you, billionaire investor Mark Cuban launched Cyber Dust, an app for disappearing text messages and photos. Once the recipient views the note, it vanishes in seconds. Cuban says he was inspired to create this service after being challenged by the FCC over insider trading allegations, of which he was eventually cleared. “What I learned very quickly was they took old emails and messages and created whatever context they wanted to create for it,” says Cuban. Cuban took his idea to app developers and launched Cyber Dust to...