A non-practicing entity has filed a case against Apple in the US, claiming certain iPhone security features like user passcodes and other unlock methods infringe on owned patents.

Lodged in the patent holder-friendly US District Court for the Western District of Texas, the suit from Altpass LLC claims Apple's iPhone infringes on a pair of patents that detail methods of creating digital signatures that can later be used for user authentication. This can include passcode and password creation, as well as Face ID technology, the complaint alleges.