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Manually operated symmetric encryption cipher
history of cryptography, the Nihilist cipher is a manually operated symmetric encryption cipher, originally used by Russian Nihilists in the 1880s to organize
Nihilist_cipher
Complex Soviet pencil and paper cipher
defection in 1957. The VIC cipher can be regarded as the evolutionary pinnacle of the Nihilist cipher family. The VIC cipher has several important integrated
VIC_cipher
System to replace plaintext with ciphertext
In cryptography, a substitution cipher is a method of encrypting that creates the ciphertext (its output) by replacing units of the plaintext (its input)
Substitution_cipher
Steganography method
Bacon's cipher or the Baconian cipher is a method of steganographic message encoding devised by Francis Bacon in 1605. In steganography, a message is
Bacon's_cipher
Type of code
tapping the numbers on pipes or walls. It is said to have been used by nihilist prisoners of the Russian Czars and also by US prisoners of war during the
Polybius_square
Simple and widely known encryption technique
A Caesar cipher is one of the simplest and most widely known encryption techniques used in cryptography. It is a type of substitution cipher in which
Caesar_cipher
Early block substitution cipher
The Playfair cipher or Playfair square or Wheatstone–Playfair cipher is a manual symmetric encryption technique and was the first literal digram substitution
Playfair_cipher
Simple type of polyalphabetic encryption system
The Vigenère cipher (French pronunciation: [viʒnɛːʁ]) is a method of encrypting alphabetic text where each letter of the plaintext is encoded with a different
Vigenère_cipher
Type of substitution cipher
pigpen cipher (alternatively referred to as the masonic cipher, Freemason's cipher, Rosicrucian cipher, Napoleon cipher, and tic-tac-toe cipher) is a geometric
Pigpen_cipher
German cipher machine during World War II
The Enigma machine is a cipher device developed and used in the early- to mid-20th century to protect commercial, diplomatic, and military communication
Enigma_machine
Simple encryption method
substitution cipher that replaces a letter with the 13th letter after it in the Latin alphabet. It is a special case of the Caesar cipher which was developed
ROT13
Encryption and decryption method
A book cipher is a cipher in which each word or letter in the plaintext of a message is replaced by some code that locates it in another text, the key
Book_cipher
Encryption technique
the principles of information theory. Digital versions of one-time pad ciphers have been used by nations for critical diplomatic and military communication
One-time_pad
Type of transposition cipher
The rail fence cipher (also called a zigzag cipher) is a classical type of transposition cipher. It derives its name from the manner in which encryption
Rail_fence_cipher
Multiple-substitution writing system cipher
polyalphabetic cipher is a substitution, using multiple substitution alphabets. The Vigenère cipher is probably the best-known example of a polyalphabetic cipher, though
Polyalphabetic_cipher
Method of encryption
In cryptography, a transposition cipher (also known as a permutation cipher) is a method of encryption which scrambles the positions of characters (transposition)
Transposition_cipher
Substitution cipher
(Hebrew: אתבש; also transliterated Atbaš) is a monoalphabetic substitution cipher originally used to encrypt the Hebrew alphabet. It can be modified for use
Atbash
Fundamental tool in cryptography
ciphers, including the Vigenère cipher and Blaise de Vigenère's less well-known autokey cipher. All polyalphabetic ciphers based on the Caesar cipher
Tabula_recta
Polyalphabetic encryption system
The Beaufort cipher, created by Sir Francis Beaufort, is a substitution cipher similar to the Vigenère cipher, with a slightly modified enciphering mechanism
Beaufort_cipher
Substitution cipher based on linear algebra
Hill cipher is a polygraphic substitution cipher based on linear algebra. Invented by Lester S. Hill in 1929, it was the first polygraphic cipher in which
Hill_cipher
Encryption technique
The Two-square cipher, also called double Playfair, is a manual symmetric encryption technique. It was developed to ease the cumbersome nature of the large
Two-square_cipher
Polyalphabetic substitution encryption and decryption system
The Alberti cipher, created in 1467 by Italian architect Leon Battista Alberti, was one of the first polyalphabetic ciphers. In the opening pages of his
Alberti_cipher
Cryptographic cipher
The Aristocrat Cipher is a type of monoalphabetic substitution cipher in which plaintext is replaced with ciphertext and encoded into assorted letters
Aristocrat_Cipher
Symmetric encryption cipher
The four-square cipher is a manual symmetric encryption technique. It was invented by the French cryptographer Felix Delastelle. The technique encrypts
Four-square_cipher
Type of cipher used in World War I
In cryptography, the ADFGVX cipher was a manually applied field cipher used by the Imperial German Army during World War I. It was used to transmit messages
ADFGVX_cipher
Cryptographic cipher device
using digits. It also is known as a monôme-binôme cipher. In 1555, Pope Paul IV created the office of Cipher Secretary to the Pontiff. In the late 1580s, this
Straddling_checkerboard
Disused cipher that was used historically
In cryptography, a classical cipher is a type of cipher that was used historically but, for the most part, has fallen into disuse. In contrast to modern
Classical_cipher
Cryptography in the Indian classic treatise Kamasutra
the names Kautilya and Muladeviya. The ciphers described in the Jayamangala commentary are substitution ciphers: in Kautiliyam the letter substitutions
Mlecchita_vikalpa
Puzzle
text. Generally the cipher used to encrypt the text is simple enough that the cryptogram can be solved by hand. Substitution ciphers where each letter is
Cryptogram
Fractionated cipher
trifid cipher is a classical cipher invented by Félix Delastelle and described in 1902. Extending the principles of Delastelle's earlier bifid cipher, it
Trifid_cipher
Type of substitution cipher
The affine cipher is a type of monoalphabetic substitution cipher, where each letter in an alphabet is mapped to its numeric equivalent, encrypted using
Affine_cipher
Simple form of encryption
null cipher, also known as concealment cipher, is an ancient form of encryption where the plaintext is mixed with a large amount of non-cipher material
Null_cipher
Cryptographic algorithm
considered incriminating. Furthermore, analysis has revealed flaws in the cipher such that it is now considered insecure. This algorithm uses a standard
Solitaire_(cipher)
Encoding for text messages
timing of the taps to isolate letters. To communicate the word "hello", the cipher would be the following (with the pause between each number in a pair being
Tap_code
Type of polyalphabetic substitution 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
Running_key_cipher
Classic polyalphabet encryption system
An autokey cipher (also known as the autoclave cipher) is a cipher that incorporates the message (the plaintext) into the key. The key is generated from
Autokey_cipher
Encryption tool used to perform a transposition cipher
cylinder", also σκύταλον skútalon) is a tool used to perform a transposition cipher, consisting of a cylinder with a strip of parchment wound around it on which
Scytale
Study of the frequency of letters or groups of letters in a ciphertext
letters in a ciphertext. The method is used as an aid to breaking classical ciphers. Frequency analysis is based on the fact that, in any given stretch of
Frequency_analysis
Rotor cipher machine
The Schlüsselgerät 41 ("Cipher Machine 41"), also known as the SG-41 or Hitler mill, was a rotor cipher machine, first produced in 1941 in Nazi Germany
Schlüsselgerät_41
Encryption system
In classical cryptography, the bifid cipher is a cipher which combines the Polybius square with transposition, and uses fractionation to achieve diffusion
Bifid_cipher
French cypher that remained unbroken for several centuries
The Great Cipher (French: Grand chiffre) was a nomenclator cipher developed by the Rossignols, several generations of whom served the French monarchs
Great_Cipher
Class of cipher
In the history of cryptography, a grille cipher was a technique for encrypting a plaintext by writing it onto a sheet of paper through a pierced sheet
Grille_(cryptography)
Cipher method
The Chaocipher is a cipher method invented by John Francis Byrne in 1918 and described in his 1953 autobiographical Silent Years. He believed Chaocipher
Chaocipher
Method in cryptanalysis
method) is a method of attacking polyalphabetic substitution ciphers, such as the Vigenère cipher. It was first published by Friedrich Kasiski in 1863, but
Kasiski_examination
Method for writing secret messages
messages inside an ordinary letter so that the whole would not appear to be a cipher at all. Such a disguised message is considered to be an example of steganography
Cardan_grille
Niederreiter cryptosystem • Niels Ferguson • Nigel de Grey • Nihilist cipher • Nikita Borisov • Nimbus (cipher) • NIST hash function competition • Nonlinear-feedback
Index of cryptography articles
Index_of_cryptography_articles
British paper cryptographic system
contained on a set of vocabulary cards, and cipher sheets for superencryption of the numeric code words. The cipher sheets, which are typically changed daily
BATCO
Rasterschlüssel 44 (abbr. RS 44) was a manual cipher system, used by the German Wehrmacht during the Second World War. The cipher was designed by the astronomer and
Rasterschlüssel_44
The Reihenschieber (English: Row Slider) was a hand cipher system used by the German Bundeswehr. It was developed during 1957 and used until the early
Reihenschieber
Private amusement embedded in a court judgement in the ''DaVinci Code''
Titanic Historical Society – among other things. The cipher was a type of polyalphabetic cipher known as a Variant Beaufort, using a keyword based on
Smithy_code
American domestic terrorist (1942–2023)
by Kaczynski. People inspired by Kaczynski's ideas include members of nihilist, anarchist, and eco-extremist movements; as well as conservative intellectuals
Ted_Kaczynski
Cipher used by the UK in World War II
words a number. The numbers are then used as a key for a transposition cipher to conceal the plaintext of the message, often by double transposition.
Poem_code
Study of the development of nihilism
leanings, many of his readers likewise took up the name of nihilist, thus ascribing the Russian nihilist movement its name. Nihilism was further discussed by
History_of_nihilism
Revelation of secrets to unauthorized parties
cryptography Ciphers by family Polyalphabetic Alberti Beaufort Enigma Trithemius Vigenère Polybius square ADFGVX Bifid Nihilist Tap code Trifid VIC cipher Square
Information_leakage
German Naval World War II hand-cipher system
German Naval World War II hand-cipher system used as a backup method when no working Enigma machine was available. The cipher had two stages: a transposition
Reservehandverfahren
Cryptographic system for numbers
cryptography Ciphers by family Polyalphabetic Alberti Beaufort Enigma Trithemius Vigenère Polybius square ADFGVX Bifid Nihilist Tap code Trifid VIC cipher Square
Shackle_code
How often identical letters appear in the same position in two texts
change if both texts are scrambled by the same single-alphabet substitution cipher, allowing a cryptanalyst to quickly detect that form of encryption. The
Index_of_coincidence
Paper based encryption system, used in the American civil war
cryptography Ciphers by family Polyalphabetic Alberti Beaufort Enigma Trithemius Vigenère Polybius square ADFGVX Bifid Nihilist Tap code Trifid VIC cipher Square
Slidex
Concept in cryptanalysis
follow other symbols. The method is used as an aid to breaking classical ciphers. Contact analysis is based on the fact that, in any sample of any written
Contact_analysis
French-English writer (1864–1927)
of the Book of Ezekiel preserved in the Imperial Library at Petrograd a cipher message that gave the whereabouts of the concealed treasures from King Solomon's
William_Le_Queux
Swiss experimental musician
Osaka) 2007: Schimpfluch Commune Int 2MC+CDR (Nihilist Chicago) 2007: For The Tasmanian Devils 9*lathe (Cipher Productions Tasmania) 2009: Paris Aktionen
Dave_Phillips_(musician)
List of cases featuring Fictional British detective Sexton Blake
Anon. (Cecil Hayter) The Union Jack (2nd Series) 606 The Case of the Nihilist's Daughter Anon. (Norman Goddard) The Union Jack (2nd Series) 607 The Quest
Sexton Blake bibliography part 2: 1912–1945
Sexton_Blake_bibliography_part_2:_1912–1945
Bulgarian revolutionary (1856–1918)
siromahomilstvo movement, a Bulgarian left-wing, populist, and Russian nihilist movement that sought to create a society which protected the poorest among
Spiro_Gulabchev
List of cases featuring fictional British detective Sexton Blake
an ex-constable named Kennedy. The Union Jack (1st Series) 69 Nalda the Nihilist; or, Sexton Blake in Russia Anon. (W. J. Lomax) Sexton Blake has a maid
Sexton_Blake_bibliography
Japanese materials) is the main antagonist of the game. He is a sociopathic nihilist who served the Gestahlian Empire as Court Mage until he used the Warring
Characters of Final Fantasy VI
Characters_of_Final_Fantasy_VI
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