| a |
The whole sentence is written backwards. Plaintext
is "WELCOME TO OUR PUZZLE
PAGES". |
| b |
The sentence is split into groups of three
letters then each group is written backwards. Plaintext is "THE
SPY IS WEARING A BLUE COAT". |
| c |
The sentence is split in half, then the letters
in the second half are written in between the letters of the
first half. Plaintext is "YOU
HAVE CRACKED THIS CODE". |
| d |
The sentence is split into groups of four
letters and a dummy letter inserted in the middle of each group.
Plaintext is "WE WILL ATTACK
AT SUNSET". |
| e |
The sentence is split into groups of three
letters (including a couple of dummy letters at the end), and
the groups of letters are mixed up (in this case the permutation
is 12345678 > 36827514). Plaintext is "THIS
MESSAGE IS TOP SECRET". |
| f |
The sentence is split into groups of four
letters (including a dummy letter at the end), and the middle
two letters in each group are swapped round. Plaintext is "NOW
YOU CAN MAKE UP YOUR OWN CODES". |
