Transposition Cipher

The origin of each of us stems from codes of genetic inheritance. 

John Eccles



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The letters or words of the plaintext are reordered in some way, fixed by a given rule (the key). One example of a transposition cipher, is to reverse the order of the letters in a plaintext. … Another type of transposition cipher is the Scytale, which was an encryption device used by the Ancient Greeks and Spartans.

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 (the plaintext is reordered). Mathematically a bijective function is used on the characters’ positions to encrypt and an inverse function to decrypt.