David Kahn, Leading Historian of Codes and Code Breaking, Dies at 93
David Kahn, whose 1967 book, “The Codebreakers,” established him as the world’s pre-eminent authority on cryptology — the science of making and breaking secret codes — died on Jan. 24 in the Bronx. He was 93. His son Michael said the death, at a senior living facility, was from the long-term effects of a stroke…