What does cryptograph mean?
A cryptograph is, most commonly, a piece of writing that has been converted into cipher so its meaning is hidden from anyone lacking the key. The term also has a second, related sense: a particular cipher or cryptographic device — the system of rules or mechanism by which plaintext is turned into secret characters and restored again. Historically significant in military and diplomatic correspondence, cryptographs were the raw material of codebreaking long before digital encryption existed, appearing in the work of nineteenth-century telegraphers, spies, and puzzle-setters alike. Today the word is rare and somewhat old-fashioned; readers are far likelier to encounter ciphertext, cryptogram, or simply encryption. Even so, cryptograph remains a useful term for describing enciphered texts in historical contexts, and it shares its Greek roots — kryptos (hidden) and graphein (to write) — with the entire modern vocabulary of cryptography, from encrypt to cryptography itself.
nounA piece of writing in cipher or code; also, a cipher or cryptographic system used to encipher and decipher messages.
- An enciphered or coded piece of writing; text that has been transformed into cipher.
- A cipher or cryptographic system — the method or apparatus used to convert plaintext into secret characters and back.
"The intercepted dispatch proved to be a cryptograph that took the codebreakers three weeks to solve."
"The spy's notebook was filled with cryptographs that no analyst could initially unravel."
"Early telegraph engineers devised a cryptograph to keep commercial messages confidential along public wires."
Standard English pluralization applies.
"The museum's collection includes several nineteenth-century cryptographs used for diplomatic correspondence."
Before computers, a 'cryptograph' was literally a machine for scrambling secrets — the word predates modern encryption by well over a century.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Etymology of cryptograph
The word cryptograph derives from Greek roots: kryptos, meaning hidden or concealed, and graphein, meaning to write. It entered English usage in the nineteenth century amid growing interest in secret writing for diplomacy, warfare, and commerce, alongside sibling coinages such as cryptography and cryptogram. It belongs to the same broad family as cryptic and encrypt (from kryptos) and graphic and photograph (from graphein). While the exact date of first attestation varies across sources, the word was clearly established by the mid-to-late nineteenth century.
Related word forms
How cryptograph is actually used
Cryptograph is a rare, somewhat dated word found chiefly in historical and technical literature about codes and ciphers; in everyday modern usage it has largely been displaced by terms like ciphertext, cryptogram, and encryption.
Easily confused with cryptograph
A cryptogram is specifically an encrypted message or puzzle, while a cryptograph can refer either to such an enciphered text or more broadly to the cipher system itself.
Cryptography is the science and practice of designing ciphers, whereas a cryptograph is an individual enciphered text or a specific cipher.