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Applying ROT13 to a piece of text merely requires examining its alphabetic characters and replacing each one by the letter 13 places further along in the alphabet, wrapping back to the beginning if necessary.A becomes N, B becomes O, and so on up to M, which becomes Z, then the sequence continues at the beginning of the alphabet: N becomes A, O becomes B, and so on to Z, which becomes M.When encrypting, a person looks up each letter of the message in the 'plain' line and writes down the corresponding letter in the 'cipher' line. The encryption can also be represented using modular arithmetic by first transforming the letters into numbers, according to the scheme, A = 0, B = 1,..., Z = 25.Encryption of a letter x by a shift n can be described mathematically as Plaintext: Decryption is performed similarly, (There are different definitions for the modulo operation. I.e., if x n or x-n are not in the range 0...25, we have to subtract or add 26.) Read more ...Although such letter transpositions do hinder reading for meaning compared with unaltered text, reading behavior is still remarkably fluent, and particularly when the transpositions involve inner-letters (Rayner, White, Johnson, & Liversedge, 2006).
For example, more errors are made to real word anagrams as well as nonword anagrams formed by a single transposition (e.g., trial-trail, jugde-judge) compared with non-anagram controls (Andrews, 1996; Bruner & O’Dowd, 1958; Chambers, 1979; O’Connor & Forster, 1981; Perea, Rosa, & Gómez, 2005).
Atbash is an ancient encryption system created in the Middle East. The Atbash cipher is a simple substitution cipher that relies on transposing all the letters in the alphabet such that the resulting alphabet is backwards.
The first letter is replaced with the last letter, the second with the second-last, and so on.
To give a small level of encryption, this table can be randomized and shared with the recipient.
In order to fit the 26 letters of the alphabet into the 25 spots created by the table, the letters i and j are usually combined.