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- Ciphertext - Wikipedia
In cryptography, ciphertext or cyphertext is the result of encryption performed on plaintext using an algorithm, called a cipher [1] Ciphertext is also known as encrypted or encoded information because it contains a form of the original plaintext that is unreadable by a human or computer without the proper cipher to decrypt it
- Cipher - Wikipedia
In casual contexts, "code" and "cipher" can typically be used interchangeably; however, the technical usages of the words refer to different concepts Codes contain meaning; words and phrases are assigned to numbers or symbols, creating a shorter message An example of this is the commercial telegraph code which was used to shorten long telegraph messages which resulted from entering into
- Caesar cipher - Wikipedia
In cryptography, a Caesar cipher, also known as Caesar's cipher, the shift cipher, Caesar's code, or Caesar shift, is one of the simplest and most widely known encryption techniques It is a type of substitution cipher in which each letter in the plaintext is replaced by a letter some fixed number of positions down the alphabet
- Book cipher - Wikipedia
Book cipher The King James Bible, a highly available publication suitable for the book cipher 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
- Substitution cipher - Wikipedia
In cryptography, a substitution cipher is a method of encrypting that creates the ciphertext (its output) by replacing units of the plaintext (its input) in a defined manner, with the help of a key; the "units" may be single letters (the most common), pairs of letters, triplets of letters, mixtures of the above, and so forth The receiver deciphers the text by performing the inverse
- Transposition cipher - Wikipedia
Transposition cipher Step-by-step process for the double columnar transposition cipher In cryptography, a transposition cipher (also known as a permutation cipher) is a method of encryption which scrambles the positions of characters (transposition) without changing the characters themselves
- Copiale cipher - Wikipedia
The Copiale cipher is a substitution cipher It is not a 1-for-1 substitution but rather a homophonic cipher: each ciphertext character stands for a particular plaintext character, but several ciphertext characters may encode the same plaintext character For example, all the unaccented Roman characters encode a space Seven ciphertext characters encode the single letter "e" In addition, some
- Vigenère cipher - Wikipedia
The Vigenère cipher is named after Blaise de Vigenère (pictured), although Giovan Battista Bellaso had invented it before Vigenère described his autokey cipher A reproduction of the Confederacy 's cipher disk used in the American Civil War on display in the National Cryptologic Museum The Vigenère cipher (French pronunciation: [viʒnɛːʁ]) is a method of encrypting alphabetic text where
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