Transposition Cipher Edilasio Pereira Steven Pascal Louis Szgalsky

Transposition Cipher Edilasio Pereira Steven Pascal Louis Szgalsky Kimberly Chiffens

• 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. 09/27/10 copyright 2006 free template from 2

The Rail Fence Cipher • POETRY IS WHAT IS LOST IN TRANSLATION P E R I W A I L S I T A S A I N O T Y S H T S O T N R N L T O 09/27/10 copyright 2006 free template from 3

Rail Fence Ciphertext • ITIAGOAIGTSHSSOSTES 09/27/10 copyright 2006 free template from 4

. . . Decrypted • TIAGOAIGT SHSSOSTES • Message: IS THIS AS GOOD AS IT GETS 09/27/10 copyright 2006 free template from 5

Columnar Transposition Message: THE GOLDEN RULE IS THAT THERE ARE NO GOLDEN RULES 09/27/10 copyright 2006 free template from 6

Columnar Transposition (cont) THEG OLDE NRUL EIST HATT HERE AREN OGOL DENR ULES 09/27/10 copyright 2006 free template from 7

Columnar Transposition (cont) TONEHHAODUHLRIAERGELEDUSTREON EGELTTENLRS 09/27/10 copyright 2006 free template from 8

Columnar Transposition Ciphertext AEGLRADHNTAHSTTAETWYCEHOOCE IKRBELMUSTVXY 09/27/10 copyright 2006 free template from 9

Columnar Decrypted LARGE ANDTH ATSTH EWAYT HECOO KIECR UMBLE STVXY AND THATS THE WAY THE COOKIE CRUMBLES 09/27/10 copyright 2006 free template from 10