Apple has sued the Corellium company, TechCrunch reports. Corellium creates virtual versions of Apple's iOS in the web browser, so that security researchers can search the mobile operating system for errors.
Apple says that Corellium infringes copyright when copying iOS. "Corellium earns from illegal replicas of a copyrighted operating system and from apps that run on the iPhone, iPad, and other devices," Apple writes in court documents.
Corellium does not have a license to use the software. Apple wants the company to stop making virtual versions of iOS. Compensation is also requested for "lost income".
A profile of Forbes described last year how two of the founders of Corellium used to make jailbreaks of the iPhone. With a jailbreak, users can "break open" a phone to get full access and make adjustments so that they can download apps outside the App Store, for example. Apple does not allow this.
Apple recently announced a program whereby selected hackers get access to special iPhones that are less closed than iPhones for consumers. Researchers can use this to look for vulnerabilities in the system.