Noun a cipher that can't be decoded She was nothing more than a cipher. Verb were surprised by how much we had spent on the cruise after we had ciphered out the grand total. Examples are …

CIPHER meaning: 1. a system of writing that prevents most people from understanding the message: 2. a person or…. Learn more.

Cipher, any method of transforming a message to conceal its meaning. The term is also used synonymously with ciphertext or cryptogram in reference to the encrypted form of the message. All …

CIPHER definition: a secret method of writing or recording data, such as by substituting or adding letters or numbers, using specially formed symbols, or the like; code. See examples of cipher used in a …

In cryptography, a cipher (or cypher) is an algorithm for performing encryption or decryption —a series of well-defined steps that can be followed as a procedure.

Definition of cipher noun in Oxford Advanced Learner's Dictionary. Meaning, pronunciation, picture, example sentences, grammar, usage notes, synonyms and more.

If you describe someone as a cipher, you mean that they have no power and are used by other people to achieve a particular purpose. He was little more than a cipher who faithfully carried out his boss's …

cipher Any cryptographic system in which arbitrary symbols (or groups of symbols) represent units of plain text of regular length, usually single letters; units of plain text are rearranged; or both, in …

Nov 5, 2025 · (cryptography) A cryptographic system using an algorithm that converts letters or sequences of bits into ciphertext. Ciphertext; a message concealed via a cipher. The message is …

Nov 30, 2025 · What is a cipher? Learn how ciphers work, their basic components, their historical evolution, and the main classical and modern cipher types, with clear examples and links to …