A simple kind of transposition cipher writes the message into a rectangle by rows and reads it out by columns.
Asimplekin doftranspo sitionciph erwritesth emessagein toarectang lebyrowsan dreadsitou tbycolumns
Adsee tldts oirmo erbif tweab eymti rsrya cproi serdo lanta cosle ncegt wiuks iseas tmipp tinao nnohh ngnus. This cipher is often complicated by permuting the rows and columns.
Another cipher uses a grille. This is a square with holes in it such that each cell in the square appears in no more than one position when the grille is rotated to each of its four positions. As much message as will fit in the grille is written, then it is turned to another position and more message is written.
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