Kim Dotcom accuses Google, Facebook, and Twitter of violating his two-step security patent

Hours after Twitter rolled out support for two-step verification, Kim Dotcom has claimed credit for inventing the security feature. In a series of tweets, the embattled Megaupload founder points to a patent dating back to 1997 as proof for his claim, and accuses companies including Google, Facebook, and Twitter of infringing his intellectual property rights.