to write a message in cipher
1cipher — [sī′fər] n. [ME cifre < OFr cyfre < ML cifra < Ar ṣifr, ṣefr, a cipher, nothing < ṣafara, to be empty] 1. the symbol 0, indicating a value of zero 2. a person or thing of no importance or value 3. a) a system of secret writing based… …
2cipher — cipherable, adj. cipherer, n. /suy feuhr/, n. 1. zero. 2. any of the Arabic numerals or figures. 3. Arabic numerical notation collectively. 4. something of no value or importance. 5. a person of no influence; nonentity. 6. a secret method of… …
3cipher — ci•pher [[t]ˈsaɪ fər[/t]] n. 1) math. zero 2) math. any of the Arabic numerals or figures 3) a person or thing of no value or importance; nonentity 4) crp a) a secret method of writing, as by code b) writing done by such a method; a coded message …
4write in code — verb convert ordinary language into code We should encode the message for security reasons • Syn: ↑code, ↑encipher, ↑cipher, ↑cypher, ↑encrypt, ↑inscribe • Derivationally related forms: ↑ …
5Classical cipher — A cipher is a means of concealing a message, where letters of the message are substituted or transposed for other letters, letter pairs, and sometimes for many letters. In cryptography, a classical cipher is a type of cipher that was used… …
6Transposition cipher — In cryptography, a transposition cipher is a method of encryption by which the positions held by units of plaintext (which are commonly characters or groups of characters) are shifted according to a regular system, so that the ciphertext… …
7Alberti cipher — The Alberti Cipher was one of the first polyalphabetic ciphers. Leon Battista Alberti Created in the 15th century (1466/67) by Leon Battista Alberti, it was the peak of cryptography at that time.Its inventor was Leon Battista Alberti, an… …
8Caesar cipher — The action of a Caesar cipher is to replace each plaintext letter with one fixed number of places down the alphabet. This example is with a shift of three, so that a B in the p …
9Running key cipher — In classical cryptography, the running key cipher is a type of polyalphabetic substitution cipher in which a text, typically from a book, is used to provide a very long keystream. Usually, the book to be used would be agreed ahead of time, while… …
10The Alphabet Cipher — Lewis Carroll published The Alphabet Cipher in 1868, possibly in a children s magazine. It describes what is known as a Vigenère cipher, a well known scheme in cryptography. While Carroll calls this cipher unbreakable , Kasiski had published a… …
