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https://www.dcode.fr/columnar-transposition-cipher
Submission: On August 31 via manual (August 31st 2022, 11:47:55 pm UTC) from US — Scanned from JP

Form analysis
5 forms found in the DOM

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<form id="search" action="#">
  <label for="search_input">Search a tool on dCode by keywords:</label><br>
  <input type="text" id="search_input" placeholder="e.g. type 'random'" value=""> <button style="cursor: pointer;">⏎</button><br>
  <label>Browse the <a href="tools-list">full dCode tools' list</a></label><br>
</form>

#

<form id="contact_form" action="#">
  <label>Need Help ?</label><br>
  <p>Please, check our <a href="https://discord.gg/bKdbZeP" target="_blank" rel="noopener">dCode Discord</a> community for help requests!<br>NB: for encrypted messages, test our automatic <a href="/cipher-identifier">cipher identifier</a>!<br><br>
  </p>
  <label for="contact_message">Message for dCode's team:</label><br>
  <textarea id="contact_message" placeholder="A question, a suggestion, an idea, a feedback, an opinion to share? (Help requests are ignored)
NB : to get an answer, write an email address (not published)"></textarea>
  <button style="cursor: pointer;">Send this message!</button>
  <p>Thanks to your feedback and relevant comments, dCode has developed the best 'Columnar Transposition Cipher' tool, so feel free to write! Thank you!</p>
</form>

POST

<form id="decipher_transposition" method="post">
  <label for="decipher_transposition_ciphertext">Columnar Transposition ciphertext</label><a class="help" data-what="crypto_terms" style="cursor: pointer;">&nbsp;</a><br><textarea name="ciphertext" spellcheck="false"
    id="decipher_transposition_ciphertext" class="" data-hasqtip="0"></textarea><br>
  <label for="decipher_transposition_keep_punctuation">Keep Spaces, Punctuation (and other characters) <input type="checkbox" id="decipher_transposition_keep_punctuation" name="keep_punctuation"></label><br>
  <label for="decipher_transposition_lang">Plaintext (presumed) Language</label> <select id="decipher_transposition_lang" name="lang">
    <option value="en" selected="selected">English</option>
    <option value="fr">French (Français)</option>
    <option value="es">Spanish (Español)</option>
    <option value="de">German (Deutsch)</option>
    <option value="pt">Portuguese (Português)</option>
    <option value="it">Italian (Italiano)</option>
    <option value="nl">Dutch (Nederlands)</option>
    <option value="no">Norwegian (Norsk)</option>
    <option value="se">Swedish (Svenska)</option>
  </select><br>
  <h3>Decryption method</h3>
  <label class="nostar" id="label_decipher_transposition_method_key" for="decipher_transposition_method_key"><input type="radio" id="decipher_transposition_method_key" name="method" value="key" checked=""> With the encryption key or
    permutation</label><br>
  <div style="padding-left:1.5em;">
    <div id="decipher_transposition_permutation" data-name="permutation" class="permutation"><input><span class="label">→(2,1,3)⇔<span title="inverse">(2,1,3)<sup>-1</sup></span></span><input name="permutation" type="hidden" autocomplete="off"
        data-reload="true" value="{&quot;permutation&quot;:[2,1,3],&quot;key&quot;:&quot; K  E  Y &quot;}"></div>
  </div>
  <label class="nostar" id="label_decipher_transposition_method_bruteforce" for="decipher_transposition_method_bruteforce"><input type="radio" id="decipher_transposition_method_bruteforce" name="method" value="bruteforce"> Try some permutations
    (bruteforce up to size 6)</label><a class="help" data-what="crypto_terms" style="cursor: pointer;">&nbsp;</a><br>
  <h3>Grid Writing/Reading Encryption Directions</h3>
  <label for="decipher_transposition_directions">Mode</label> <select id="decipher_transposition_directions" name="directions">
    <option value="hv">Write by rows, read by columns (by default)</option>
    <option value="hh">Write by rows, read by rows</option>
    <option value="vh">Write by columns, read by rows</option>
    <option value="vv">Write by columns, read by columns</option>
  </select><br>
  <button data-post="ciphertext,keep_punctuation,lang,method,permutation,key_length,directions" post="ciphertext,keep_punctuation,lang,method,permutation,key_length,directions" style="margin: 0.1em 165.812px; cursor: pointer;">Decrypt</button>
  <div class="cf "><span>See also:</span> <a href="/caesar-box-cipher">Caesar Box Cipher</a></div>
</form>

POST

<form id="cipher_transposition" method="post">
  <label for="cipher_transposition_plaintext">Columnar Transposition plain text</label><a class="help" data-what="crypto_terms" style="cursor: pointer;">&nbsp;</a><br><textarea name="plaintext" spellcheck="false" id="cipher_transposition_plaintext"
    class="" data-hasqtip="1">dCode Columnar Transposition</textarea><br>
  <label for="cipher_transposition_keep_punctuation">Keep Spaces, Punctuation (and other characters) <input type="checkbox" id="cipher_transposition_keep_punctuation" name="keep_punctuation"></label><br>
  <label class="">Key or Permutation</label><br>
  <div id="cipher_transposition_permutation" data-name="permutation" class="permutation"><input><span class="label">→(2,1,3)⇔<span title="inverse">(2,1,3)<sup>-1</sup></span></span><input name="permutation" type="hidden" autocomplete="off"
      data-reload="true" value="{&quot;permutation&quot;:[2,1,3],&quot;key&quot;:&quot; K  E  Y &quot;}"></div>
  <label for="cipher_transposition_directions">Mode</label> <select id="cipher_transposition_directions" name="directions">
    <option value="hv">Write by rows, read by columns (by default)</option>
    <option value="hh">Write by rows, read by rows</option>
    <option value="vh">Write by columns, read by rows</option>
    <option value="vv">Write by columns, read by columns</option>
  </select><br>
  <label for="cipher_transposition_fill">If needed, fill the message with 'X' (facilitates decryption) <input type="checkbox" id="cipher_transposition_fill" name="fill"></label><br>
  <button data-post="plaintext,keep_punctuation,permutation,directions,fill" post="plaintext,keep_punctuation,permutation,directions,fill" style="margin: 0.1em 165.812px; cursor: pointer;">Encrypt</button>
  <div class="cf "><span>See also:</span> <a href="/monoalphabetic-substitution">Mono-alphabetic Substitution</a></div>
</form>

#

<form action="#">
  <h2>Need Help ?</h2>
  <p class="info">Please, check our <a href="https://discord.gg/bKdbZeP" target="_blank" rel="noopener">dCode Discord</a> community for help requests!<br>NB: for encrypted messages, test our automatic
    <a href="/cipher-identifier">cipher identifier</a>!</p>
  <h2>Questions / Comments</h2>
  <button id="comments_button" class="contact" style="cursor: pointer; margin: 0.1em 148.812px;">Write a message</button>
  <p class="info">Thanks to your feedback and relevant comments, dCode has developed the best 'Columnar Transposition Cipher' tool, so feel free to write! Thank you!</p>
</form>

Text Content

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Columnar Transposition Cipher

Tool to decrypt / encrypt with a columnar transposition, also called column
permutations cipher, a cryptographic technique that modifies the order of the
letters of a previously written text in a table.

Results


Columnar Transposition Cipher - dCode

Tag(s) : Transposition Cipher

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puzzles and problems to solve every day!
A suggestion ? a feedback ? a bug ? an idea ? Write to dCode!

Need Help ?


Please, check our dCode Discord community for help requests!
NB: for encrypted messages, test our automatic cipher identifier!



Message for dCode's team:
Send this message!

Thanks to your feedback and relevant comments, dCode has developed the best
'Columnar Transposition Cipher' tool, so feel free to write! Thank you!


COLUMNAR TRANSPOSITION CIPHER

 1. Cryptography
 2. Transposition Cipher
 3. Columnar Transposition Cipher




COLUMNAR TRANSPOSITION DECODER↺

Columnar Transposition ciphertext 

Keep Spaces, Punctuation (and other characters)
Plaintext (presumed) Language EnglishFrench (Français)Spanish (Español)German
(Deutsch)Portuguese (Português)Italian (Italiano)Dutch (Nederlands)Norwegian
(Norsk)Swedish (Svenska)



DECRYPTION METHOD

With the encryption key or permutation

→(2,1,3)⇔(2,1,3)-1
Try some permutations (bruteforce up to size 6) 



GRID WRITING/READING ENCRYPTION DIRECTIONS

Mode Write by rows, read by columns (by default)Write by rows, read by rowsWrite
by columns, read by rowsWrite by columns, read by columns
Decrypt
See also: Caesar Box Cipher


COLUMNAR TRANSPOSITION ENCODER↺

Columnar Transposition plain text 
dCode Columnar Transposition
Keep Spaces, Punctuation (and other characters)
Key or Permutation

→(2,1,3)⇔(2,1,3)-1
Mode Write by rows, read by columns (by default)Write by rows, read by rowsWrite
by columns, read by rowsWrite by columns, read by columns
If needed, fill the message with 'X' (facilitates decryption)
Encrypt
See also: Mono-alphabetic Substitution



ANSWERS TO QUESTIONS (FAQ)

Feel free to edit this Q&A, review it or improve it!


WHAT IS A COLUMNAR TRANSPOSITION CIPHER? (DEFINITION)

A columnar transposition cipher is an encryption method that swaps the columns
of a table (or a grid) containing the plain message to obtain an encrypted
message.

Feel free to edit this Q&A, review it or improve it!


HOW TO ENCRYPT USING A COLUMNAR TRANSPOSITION CIPHER?

Column transposition encryption writes plaintext in a rectangular array of N
columns (inline fill) with N the size of the permutation key.

Example: The text COLUMNS is encrypted with the permutation 1,3,2 of the key
word COL, it is written in the table

Columns1,2,3Permuted cols1,3,2PlaintextC,O,LCiphertextC,L,OU,M,NU,N,MS,X,XS,X,X



Fill in the empty boxes with a neutral letter (like X).

The encrypted message is then read in columns

Example: CUSLNXOMX

It is possible to read line by line, in which case the encrypted message would
be CLOUNMSXX

Feel free to edit this Q&A, review it or improve it!


HOW TO DECRYPT WITH A COLUMNAR TRANSPOSITION CIPHER?

Decryption by Columnar Transposition is similar to encryption. The difference
lies in the writing in the table (in row or in column according to the reading
method used during the encryption), as well as in the order of the columns which
are permuted before being sorted again in ascending order.

Example: A permutation 1,3,2 was used to obtain the message CUSLNXOMX (reading
by columns):

Permuted cols1,3,2Sorted
cols1,2,3CiphertextC,L,OPlaintextC,O,LU,N,MU,M,NS,X,XS,X,X



Feel free to edit this Q&A, review it or improve it!


HOW TO RECOGNIZE A COLUMNAR TRANSPOSITION CIPHERTEXT?

The message consists of the transposed / swapped letters, so it has all the
letters of the original message but in a different order.

The coincidence index after transposition of columns is unchanged from that of
the plain text language.

Feel free to edit this Q&A, review it or improve it!


HOW TO DECIPHER A COLUMNAR TRANSPOSITION WITHOUT THE KEY?

For short permutations (up to 5-6 letters), a brute-force algorithm can test all
permutations.

Otherwise, by knowing a word of the plain text (if possible with unusual
letters), it is possible to find the position of its letters and to deduce the
compatible columns permutations.

Ask a new question



SOURCE CODE

dCode retains ownership of the "Columnar Transposition Cipher" source code.
Except explicit open source licence (indicated Creative Commons / free), the
"Columnar Transposition Cipher" algorithm, the applet or snippet (converter,
solver, encryption / decryption, encoding / decoding, ciphering / deciphering,
translator), or the "Columnar Transposition Cipher" functions (calculate,
convert, solve, decrypt / encrypt, decipher / cipher, decode / encode,
translate) written in any informatic language (Python, Java, PHP, C#,
Javascript, Matlab, etc.) and all data download, script, or API access for
"Columnar Transposition Cipher" are not public, same for offline use on PC,
mobile, tablet, iPhone or Android app!
Reminder : dCode is free to use.


CITE DCODE

The copy-paste of the page "Columnar Transposition Cipher" or any of its
results, is allowed as long as you cite dCode!
Cite as source (bibliography):
Columnar Transposition Cipher on dCode.fr [online website], retrieved on
2022-09-01, https://www.dcode.fr/columnar-transposition-cipher


NEED HELP ?

Please, check our dCode Discord community for help requests!
NB: for encrypted messages, test our automatic cipher identifier!


QUESTIONS / COMMENTS

Write a message

Thanks to your feedback and relevant comments, dCode has developed the best
'Columnar Transposition Cipher' tool, so feel free to write! Thank you!


Powered by 翻訳
Summary
 * Columnar Transposition Decoder
 * Columnar Transposition Encoder
 * What is a Columnar Transposition cipher? (Definition)
 * How to encrypt using a Columnar Transposition cipher?
 * How to decrypt with a Columnar Transposition cipher?
 * How to recognize a Columnar Transposition ciphertext?
 * How to decipher a Columnar Transposition without the key?

Similar pages
 * Caesar Box Cipher
 * Mono-alphabetic Substitution
 * Transposition Cipher
 * AMSCO Cipher
 * Scytale Cipher
 * Rail Fence (Zig-Zag) Cipher
 * Alphabetical Disorder
 * DCODE'S TOOLS LIST

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Forum/Help

Keywords
transposition, column, columnar, permutation, disorder, grid, table, rectangle,
rectangular
Links
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 * dCode App
 * Wikipedia


https://www.dcode.fr/columnar-transposition-cipher
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www.dcode.fr Open in urlscan Pro 213.186.33.19 Public Scan

Form analysis 5 forms found in the DOM

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Text Content

www.dcode.fr Open in urlscan Pro
213.186.33.19 Public Scan

Form analysis
5 forms found in the DOM