# corresponding+cipher

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**Ciphertext**— The Zimmermann Telegram (as it was sent from Washington to Mexico) encrypted as ciphertext. This article is about encrypted information. For an overview of cryptographic technology in general, see Cryptography. In cryptography, ciphertext (or… …22

**Cryptography**— Secret code redirects here. For the Aya Kamiki album, see Secret Code. Symmetric key cryptography, where the same key is used both for encryption and decryption …23

**Marian Rejewski**— (probably 1932, the year he first solved the Enigma machine). Courtesy of Janina Sylwestrzak, Rejewski s daughter. Born Marian Adam Rejewski August 16, 1905(1905 0 …24

**Cryptanalysis**— Close up of the rotors in a Fialka cipher machine Cryptanalysis (from the Greek kryptós, hidden , and analýein, to loosen or to untie ) is the study of methods for obtaining the meaning of encrypted information, without access to the secret… …25

**Ciphertext stealing**— In cryptography, ciphertext stealing (CTS) is a general method of using a block cipher mode of operation that allows for processing of messages that are not evenly divisible into blocks without resulting in any expansion of the ciphertext, at the …26

**Correlation attack**— In cryptography, correlation attacks are a class of known plaintext attacks for breaking stream ciphers whose keystream is generated by combining the output of several linear feedback shift registers (called LFSRs for the rest of this article)… …27

**Enigma machine**— Military Enigma machine …28

**One-time pad**— Excerpt from a one time pad In cryptography, the one time pad (OTP) is a type of encryption, which has been proven to be impossible to crack if used correctly. Each bit or character from the plaintext is encrypted by a modular addition with a bit …29

**Index of coincidence**— In cryptography, coincidence counting is the technique (invented by William F. Friedman[1]) of putting two texts side by side and counting the number of times that identical letters appear in the same position in both texts. This count, either as …30

**Musical notation**— Music markup redirects here. For the XML application, see Music Markup Language. Hand written musical notation by J. S. Bach: beginning of the Prelude from the Suite for Lute in G minor BWV 995 (transcription of Cello Suite No. 5, BWV 1011) BR… …