Herbert O Yardley

Herbert O. Yardley, one of the greatest authorities on secret codes and ciphers in the 1920s, was inducted into the NSA Hall of Honor posthumously in 1999. He is also the author of The Chinese Black Chamber.

Herbert O. Yardley, one of the greatest authorities on secret codes and ciphers in the 1920s, was inducted into the NSA Hall of Honor posthumously in 1999. He is also the author of The Chinese Black Chamber. See less