A
cipher where the letters of the
plaintext are
jumbled up. This is usually done in some
systematic way so that the message can be
decrypted by its intended recipient.
An example where the first, second, and third letters are each written on a separate line then repeat this pattern for the rest of the message.
The plaintext:
Two tires fly. Two wail.
A bamboo grove, all chopped down
From it, warring songs.
The enciphering step:
T T E L W A A M O O A C P D W R I A I S G
W I S Y O I B B G V L H P D N O T R N O S
O R F T W L A O R E L O E O F M W R G N
The ciphertext:
TTELW AAMOO ACPDW RIAIS GWISY
OIBBG VLHPD NOTRN OSORF TWLAO
RELOE OFMWR GN
the haiku used above is from Cryptonomicon