code book
Secret message key
A code book is a reference volume that pairs plaintext words or phrases with their coded equivalents, used historically for encrypting and decrypting secret communications.
Intelligence agencies and military units relied on code books before modern cryptography.
The term extends to any systematic compilation of codes: The building code book runs to 800 pages.
In signals and telecommunications, a code book lists standardized symbols or abbreviations.
- keyLock-opening device
- cipherHidden writing system
- coverProtect by overlaying
- espionageCovert intelligence gathering
- paperPressed pulp for writing
number · Rosetta Stone · Enigma machine · cryptanalysis · encryption · secret · top secret · steganography · index · glossary · algorithm · spycraft · black ops · spy novel · letter · page · manual · signals intelligence
- espionagespy, spies, double agent, double agents, spying
- secret codescipher, password, passphrase, cipher key, decoder
- cipherscipher, Caesar cipher, substitution cipher, ciphertext, plaintext
- telegraphytelegraph, telegraphy, telegraph key, telegraph line, telegraph lines
- legal codesstatute, statutes, codified laws, state statutes, federal statutes
- cryptographyAES, encryption, ciphertext, decryption, cipher