Apple Inc, which has resisted pressure from U.S. law enforcement to unlock encrypted iPhones, this month, rehired a top expert in practical cryptography to bring more powerful security features to a wide range of consumer products. Jon Callas, who co-founded several well-respected secure communications companies including PGP Corp, Silent Circle and Blackphone, rejoined Apple in May, an Apple spokesman said.
Callas had worked at Apple in the 1990s and again between 2009 and 2011, when he designed an encryption system to protect data stored on a Macintosh computer. Apple declined to detail his new role, and Callas declined to comment. The Cupertino, California-based company has clashed with the U.S. government over whether Apple should help law enforcement access encrypted customer information stored on its devices.