Explore the fascinating history of cryptography in Vietnam during the French and American Wars in this invited talk by Neal Koblitz at Asiacrypt 2016. Delve into the cryptographic techniques and strategies employed during these pivotal conflicts, gaining insights into how encryption and code-breaking played crucial roles in shaping the outcomes of both wars. Learn about the unique challenges faced by cryptographers in the Vietnamese context and discover how their innovations contributed to the field of cryptography as a whole.