In cryptography, a transposition cipher is a method of encryption by which the positions held by units of plaintext 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.
Pages
279
Format
Kindle Edition
Military Cryptanalysis : Transposition and Fractionating Systems: Part IV
In cryptography, a transposition cipher is a method of encryption by which the positions held by units of plaintext 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.