What does enciphered mean?
Enciphered describes a message that has been converted into a cipher — a deliberate system of symbols or substituted characters designed to hide its meaning from anyone who does not possess the key. The word functions both as the past tense of the verb 'to encipher' and as an adjective modifying nouns such as message, text, or transmission. Historically central to military and diplomatic correspondence, enciphering was long done by hand, with clerks substituting letters according to agreed systems before radios and telegraphs made interception a serious threat. Today the term survives mainly in cryptographic scholarship, intelligence history, and technical literature, where it is often distinguished from the broader modern word 'encrypted'. To call a document enciphered is therefore to evoke a tradition of secrecy stretching back centuries, when the security of states rested on carefully guarded alphabets and the skill of those who could transform plain language into apparently meaningless strings of characters.
Past tense and past participle of 'encipher': to convert a message into a cipher or secret code.
"The operator enciphered the orders before sending them across enemy lines."
Often used interchangeably with 'encrypt' in older texts, though some modern cryptographers reserve 'encipher' for symbol-level substitution systems.
Describing text or communication that has been converted into cipher.
"An enciphered dispatch was recovered from the wreck."
Before computers could encrypt your data, wartime clerks enciphered messages by hand — one wrong symbol could change the fate of nations.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Etymology of enciphered
The word derives from 'cipher', which entered English in the late medieval period from Old French 'cifre', ultimately traceable to Arabic 'ṣifr', meaning zero or empty. The verb 'encipher', formed by adding the prefix 'en-' (meaning to put into) to 'cipher', appeared in English around the early 17th century as interest in cryptography grew alongside diplomatic and military needs. Its negative counterpart 'decipher' shares the same root, as do 'cryptography' and 'cryptic', all pointing back to the idea of hidden or concealed writing. The past participle form 'enciphered' has been used since at least the 17th century to describe texts rendered unintelligible without knowledge of the key.
Related word forms
How enciphered is actually used
The term is somewhat technical and formal, associated with cryptography, military communications, and intelligence work. In everyday modern usage, 'encrypted' has largely displaced it, though 'enciphered' persists in historical, academic, and specialist cryptographic contexts.
Easily confused with enciphered
'Enciphered' specifically refers to conversion into a system of symbols or codes (cipher), while 'encrypted' is the broader modern term for scrambling data using any algorithm, especially digital ones.