Search for a toolSearch a tool on dCode by keywords: GoRail Fence (Zig-Zag) CipherTools to decrypt/encrypt Rail Fence automatically. Rail Fence cipher is a transposition cipher consisting in writing a text in zig-zag and read it from left to right.
Rail Fence Cipher Decoder
Rail Fence CiphersThe Rail Fence cipheris a very basic transposition cipher. The user specifies a numberof rows and the message is written in a zig-zag fashion across these rows, moving up and down between the top and bottom row like the rails of a fence. Ciphers similarto this were used as low-security military field ciphers during the nineteenth century. Please send all feedback, complaints, and lucrative sponsorship deals to firstname.lastname@example.org.
Online calculator: Rail fence cipher decoder
PLANETCALC Online calculatorslanguagesearchLogincheckEnglishEspañolFrançaisРусскийhomechevron_rightRail fence cipher decoderRail fence cipher decoderThis online calculator helps to decode message encrypted using rail fence cipher by listing variants of decoded text for different number of "rails" person_outlineTimurschedule2017-06-01 09:00:10Articles that describe this calculatorRail fence cipherRail fence cipher decoderWRIVDLANEAEDSOEE.FE TOC CR E EEncoded message Max rails to try CalculateDecode tableSave share extensionTags: ciphercryptographycypherdecoderail fencetextzigzagPLANETCALC, Rail fence cipher decoderShare this page share my calculationCommentsYour message Subscribe to comments notifications SendSimilar calculatorsRail fence cipherGravity Falls Bill's symbol substitution cipher decoderGravity Falls Author's symbol substitution cipher decoderSubstitution Cipher ToolSubstitution cipher breaker604 calculators in total.
Braingle » Rail Fence Cipher
TechniquesFrequency AnalysisBooksRail Fence CipherIn the rail fence cipher, the plaintext is written downwards on successive "rails" of an imaginary fence, starting a new column when the bottom is reached. The message is then read off in rows. For example, if we have 3 rails and a message of "This is a secret message", you would write out: T S A C T S G H I S R M S E I S E E E A J The last J is just a random letter to fill in the space. The secret message is then condensed and regrouped. TSACT SGHIS RMSEI SEEEA JGURLTo decipher a message you must know the number of rails that were used to encipher it. You then break up the letters into equal groups for each rail. For example, if you are using 3 rails, you would break the secret message into 3 equal groups. Now you stack the groups on top of each other and read off the message vertically. If you get gibberish, then there are probably some extra letters tacked on the end of the message that are throwing off the grouping. Try removing one letter from the end and try again.
The Rail Fence Cipher
The Rail Fence CipherAuthor: Sophia Knight '03“Virtues of a perfect cipher: ‘… that they be not laboriousto write and read; that they be impossible to decipher; and, in some cases, thatthey be without suspicion.’” - Francis Bacon The Rail Fence Cipher is a type oftransposition cipher. A transposition cipher involves therearranging of the letters in the plaintext to encrypt themessage. This is in contrast to a substitution cipher, in which theplaintext letters are replaced by letters from another alphabet (or bydifferent letters from the same alphabet).As Laurence Smith points out,transposition ciphers are to some extent analogous to jigsawpuzzles. In such puzzles and ciphers, if all the pieces are presentand in proper order, a clear picture of the message exists. If theyare mixed up, all of the elements are still present, but have noapparent meaning. If the disorder is brought about by randomshuffling, only long and painstaking attempts by trial and error canbring them back to normal order. Since practical cryptography is not apuzzle aiming to test the patience, but is the science of secretcommunication, its object is to arrange some sort of systematicdisorder, which can be set right quickly and accurately by the one forwhom the secret message is intended.” (Smith, LaurenceDwight. Cryptography: The science of secret writing. DoverPublications, INC. 1955. NewYork. 31-32) As we explain more fully below, in the Rail Fence Cipher, themessage is written in a zig-zag pattern to represent the "rails"of a fence. Historical BackgroundThe first uses of the transposition cipher are traced back to theancient Greeks. They used a device called a scytale (rhymes with "Italy") to encrypt andsend messages. The scytale, a transposition machine, was comprised ofa cylinder and a parchment, similar to a ribbon, which was wrappedaround the cylinder. The message to be encrypted was then written onthe coiled ribbon. The letters of the original message would berearranged when the ribbon was uncoiled. However, the message waseasily decrypted when the ribbon was rewrapped on a cylinder of thesame diameter as the encrypting cylinder. In this case the diameter ofthe encrypting cylinder would be the key to encrypting and ultimately decrypting thesecret message. The diameter of the cylinder determines how the ribboncoils on the cylinder and therefore how the letters in the plaintextmessage would be rearranged. Encrypting a Message with Rail FenceSimilar to the diameter of the cylinder in the scytale machine, thenumber of rows of the Rail Fence Cipher is the key to encrypting anddecrypting secret messages. In fact, the scytale used by theancient Greeks can produce the exact same encrypted messages as theRail Fence cipher if the diameter of the cylinder produced thesame number of ribbon coils as the number of rows of the Rail Fencecipher. Thus, for our implementation of Rail Fence Cipher, the numberof rows used to break up the message serves as the cryptographic key. It determines the exact formthat the secret message will take.To take an example, suppose we want to encrypt the message this is a test using a Rail Fence Cipher. In aRail Fence Cipher, after removing the spaces from the originalmessage, we would write the characters in the message in the followingzig-zag pattern, where the message is written along the "rails" of afence.t i eh s s t si a tTo encrypt, we construct the ciphertext by reading across the (3) rowsthat result.Plaintext : this is a testCiphertext: TIE HSSTS IATSpaces are used here indicate the ends of the rows. For added complexity,a key could be used to indicate the order in which to read the rows.For example, the key 213 would give HSSTS TIE IAT.Decrypting the message is easy if the row boundaries are known. Justwrite down the rows in order:TIEHSSTSIATand reconstruct the "rails" of the fence:T I EH S S T SI A TIf no row boundaries are present, it is not difficult to reconstruct the fence,as long as you know how many rows there are and in which order they are written.Recognizing Rail Fence CiphersThe Rail Fence cipher and transposition ciphers in general arerelatively easy to distinguish from substitution ciphers because theletter frequencies in the encrypted message remain the same as inunencrypted messages. For example, in a transposition cipher, youwould expect to find that the letter 'E' is the most frequent letterif the language used is English. In general, the frequency distributionof all 26 English letters would be same in a transposition cipheras they would in plain English messages.Analyzing Rail Fence CiphersIn the case of the Rail Fence Cipher, the analysis isn't difficult. Ifyou know (or suspect) that a message was encrypted with a Rail FenceCipher, it can easily be deciphered by brute force because the lettersbreak into rows according to certain fixed patterns based on thenumber of rows in the key. For example, if there are two rows, thenletters 1, 3, 5, ... of the message are in row one and letters 2, 4,6, ... are in row two. If there are 3 rows, then letters 1, 5, 9, ...are in row one, letters 2, 4, 6, 8, ... are in row two and letters 3,7, 11, ... are in row three. Therefore, the Rail Fence Cipher is nota particularly secure cipher.For Further Study and EnjoymentCryptoToolJ.Try using CryptoToolJ to create and analyze your own Rail Fence Ciphermessages.
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