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 constitutes a permutation of the plaintext. That is, the order of the units is changed. Mathematically a bijective function is used on the characters' positions to encrypt and an inverse function to decrypt.
Following are some implementations.
Read more about Transposition Cipher: Rail Fence Cipher, Route Cipher, Columnar Transposition, Double Transposition, Myszkowski Transposition, Disrupted Transposition, Grilles, Detection and Cryptanalysis, Combinations, Fractionation
Famous quotes containing the word cipher:
“The eye is the first circle; the horizon which it forms is the second; and throughout nature this primary figure is repeated without end. It is the highest emblem in the cipher of the world.”
—Ralph Waldo Emerson (1803–1882)