Declassified Cold War code-breaking manual has lessons for solving ‘impossible’ puzzles

Cortez Deacetis

Lambros D. Callimahos, the author of Armed service Cryptanalytics. Credit rating: NSA The United States National Security Agency—the country’s premier signals intelligence organization—recently declassified a Cold War-period doc about code-breaking. The 1977 book, prepared by cryptologist Lambros Callimahos, is the last in a trilogy identified as Army Cryptanalytics. It can […]