Zendian problem
The Zendian problem was an exercise in communication intelligence operations (mainly traffic analysis and cryptanalysis) devised by Lambros D. Callimahos as part of an advanced course, CA-400, that Ca
National Cryptologic School
The National Cryptologic School (NCS) is a school within the National Security Agency that provides training to members of the Intelligence Community. The National Cryptologic School is a Cryptologic
Dundee Society
The Dundee Society was a society of graduates of CA-400, a National Security Agency course in cryptology devised by Lambros D. Callimahos, which included the Zendian Problem (a practical exercise in t
Julia Ward
Julia Ward (December 1900 – June, 18 1962) was the founder of the central reference division of National Security Agency (NSA). She was inducted into the Cryptologic Hall of Honor in 2002.