Between Silk and Cyanide

As a cryptographer driven to improve the security of secret codes for Britain's Special Operations Executive (SOE) during World War II, Marks used wit and tenacity to find effective vehicles for safe communication among Allied agents. "Between Silk and Cyanide" chronicles his quest for foolproof cod [...]
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As a cryptographer driven to improve the security of secret codes for Britain's Special Operations Executive (SOE) during World War II, Marks used wit and tenacity to find effective vehicles for safe communication among Allied agents. "Between Silk and Cyanide" chronicles his quest for foolproof codes--an endeavor that led to his involvement in some of the war's most secret operations. of photos.