#RAIL FENCE CIPHER PLUS#

For example, if you type something like 'longing for a time in the past', then the engine will return 'nostalgia'. It simply looks through tonnes of dictionary definitions and grabs the ones that most closely match your search query. and you will get the encoded phrase: I_REALLY_LIKE_PUZZLES!Īnother Important Note: You will have to use 'null' letters if the phrase does not reach the imaginary grid / end.The way Reverse Dictionary works is pretty simple. The bottom row gets the final 5 units written below and in between the pairs of units in the middle row: IA_EZS_ELYLK_UZE. The middle row takes the next 10 units and adds 1 unit just after and 1 unit just before each unit in the top row: IA_EZSRLIPL. Take the first 6 units from our ciphertext and write them across the top row, leaving much space between the units: _ELYLK_UZERLIPL.

The bottom row has 5 units (5 'full cycles' x 1 unit for each cycle since it is the bottom-most row). The middle row has 10 units (5 'full cycles' x 2 units for each cycle).

Therefore, the top row has 6 units in it (5 'full cycles' + the 1 extra letter that is starting off the 6th cycle all by itself).

#RAIL FENCE CIPHER PLUS#

It is important to realize that there are 5 'full cycles' plus a 'partial cycle' of 1 more letter (5 x 4 = 20 and 20 + 1 = 21 units). There are 21 units in the example, so our 'base puzzle width' is 5 (21 / 4 = 5.25, which rounds down to 5). So divide the total units (letters + spaces) by the cycle number and round down to the next whole number. Our 3-rail fence example has a 'cycle' of 4 units. (See below.) The math equation for this is: 'Cycle' = ( x 2) - 2 ( since the top and bottom rows have half as many units per cycle as any middle row(s)). ( The next letter on the top row will actually begin the next cycle.) So a 2-rail puzzle has a 'cycle' of 2 units a 3-rail puzzle has a 'cycle' of 4 letters a 4-rail puzzle has a 'cycle' of 6 letters etc. A 'cycle' of letters runs from the top row, down through each subsequent row, and then up again, but stopping before reaching the top row again. To determine the puzzle width, which will tell us how many total units will be in each row, you must determine the 'cycle' of letters. In this example, we said that 3 fence rails were used, so the height is 3. The height is simply the number of fence rails used to create it. To solve the cipher, you must know the height and cycle of the puzzle. This will be important later on as we try to decipher it.

Note that our ciphertext has a total of 21 units (letters + spaces). Our ciphertext comes out as IA_EZS_ELYLK_UZERLIPL. We'll use a 3-rail fence to encode a new phrase and include spacing in between the words. If spaces are shown in the ciphertext, then they must be included in the count of letters to determine the width of the solution grid. You will need to add them based on context. Note : You will NOT use spaces to separate the words. To get the ciphertext : write all the letters in the first row ( from left to right ) without spaces, followed by the letters in the second row, and so on. FLEE AT ONCE', we will write it this way:

If we have 3 'rails' and a message of 'WE ARE DISCOVERED. When we reach the top rail, the message is written downwards again until the whole plaintext is written out. In this cipher, the plain text is written downwards and diagonally on successive 'rails' of an imaginary fence, then moving up when we reach the bottom rail. Here's another cipher that's easy to understand and remember as well.

Rail fence cipher