Keyless Transposition Cipher

• A transposition cipher does not substitute one symbol for another instead it changes the location of the symbols.
• Keyless Transportation cipher is simple one which is keyless. In first method the text is written into a table column by column and then row by row. In the second method the text is written into the table row by row and then transmitted column by column.
• Example of a Keyless transposition cipher using first method is rail fence cipher.

Example- Encrypt: NOTHING IS AS IT SEEMS

First write it on two lines in a zig-zag pattern (or rail fence). The cipher text is produced by transcribing the first row followed by the second row.

Cipher text: NTIGS STEMO HNIAI SES

• To decrypt, write half the letters on one line, half on the second.