| Biuro Szyfrow(noun, expression, technology, entity, history) |
| Bletchley Park(noun, expression, technology, entity, history) |
| Bletchley Park Cipher(noun, expression, technology, entity, history) |
| Book of the Law(noun, expression, technology, entity, history) |
| CAVNET(noun, technology, entity, history, cryptography) |
| Central Bureau(noun, expression, technology, entity, history) |
| Chaocipher(noun, technology, entity, history, cryptography) |
| Choctaw code talkers(noun, expression, technology, entity, history) |
| Cipher runes(noun, expression, technology, entity, history) |
| Clipper chip(noun, expression, technology, entity, history) |
| Code-O-Graph(noun, technology, entity, history, cryptography) |
| Code-talker paradox(noun, expression, technology, entity, history) |
| Codebreaker(noun, technology, entity, history, cryptography) |
| Content Scramble System(noun, expression, technology, entity, history) |
| Cryptanalysis of the Enigma(noun, expression, technology, entity, history) |
| Cryptanalysis of the Lorenz cipher(noun, expression, technology, entity, history) |
| Crypto Wars(noun, expression, technology, entity, history) |
| Cryptogram(noun, technology, entity, history, cryptography) |
| Cryptologia(noun, technology, entity, history, cryptography) |
| Cyrillic Projector(noun, expression, technology, entity, history) |