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...

Mike Mimoso talks to privacy and security veteran Jon Callas of Silent Circle about the digital footprint businesses and consumers leave, how to secure our private data, and how a new documentary sponsored by Silent Circle called “Power of Privacy” helps visualize how personal information is shared-and abused-online. Download: Jon_Callas_on_Securing_Private_Data.mp3 Music by Chris Gonsalves