Cryptonomicon is a 1999 English language novel by Neal Stephenson. It concurrently follows the exploits of World War II-era cryptographers affiliated with Bletchley Park in their attempts to crack Axis codes and fight the Nazi submarine fleet, alongside the story of their descendants, who are attempting to use modern cryptography to build a data haven in the fictitious state of Kinakuta, a small nation with geographical and political parallels to Brunei.