Jon Callas, equal parts security entrepreneur and innovator, has been hired at Apple for what will be his third stint with the company. Callas left Silent Circle, a company he cofounded, in April after four years there. Silent Circle designs and produces secure communication platforms, including the Blackphone and Silent Phone mobile devices, Silent OS...

Silent Circle, makers of the security and privacy focused Blackphone, have patched a vulnerability that could allow a malicious mobile application or remote attacker to access the device’s modem and perform any number of actions. The update was released Dec. 7 in version 1.1.13 RC3; details of the issue were disclosed today by SentinelOne, which...