Apple rehires prominent security pro as encryption fight boils

By Joseph Menn SAN FRANCISCO (Reuters) - 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 aga