| LC control no. | sh 85034453 |
|---|---|
| LC classification | Z103 Z104 Writing. Paleography QA268 Mathematics |
| Topical heading | Cryptography |
| Variant(s) | Cryptanalysis Cryptology Secret writing Steganography |
| See also | subdivision Cryptography under individual wars, e.g. World War, 1939-1945--Cryptography Signs and symbols Symbolism Writing Ciphers Data encryption (Computer science) |
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