| Tamam Shud case(noun, expression, technology, entity, history) |
| Target Intelligence Committee(noun, expression, technology, entity, history) |
| Trench code(noun, expression, technology, entity, history) |
| United States Naval Computing Machine Laboratory(noun, expression, technology, entity, history) |
| Walter Fricke(noun, expression, technology, entity, history) |
| Wilhelm Fenner(noun, expression, technology, entity, history) |
| Wilhelm Tranow(noun, expression, technology, entity, history) |
| William Blair(noun, expression, technology, entity, history) |
| World War II cryptography(noun, expression, era, epoch, period time) |
| World War I cryptography(noun, expression, era, epoch, period time) |
| World War One cryptography(noun, expression, technology, entity, history) |
| World War Two cryptography(noun, expression, technology, entity, history) |
| Zodiac Killer cipher(noun, expression, technology, entity, history) |
| capstone(noun, technology, entity, history, cryptography) |
| card catalog(noun, expression, technology, entity, history) |
| classical cryptography(noun, expression, era, epoch, period time) |
| commercial code(noun, expression, technology, entity, history) |
| communication theory of secrecy systems(noun, expression, technology, entity, history) |
| cryptogram of Olivier Levasseur(noun, expression, technology, entity, history) |
| fifty-six-bit encryption(noun, expression, technology, entity, history) |