7938 /www/nrich/html/content/id/7938/ 1 2011-12-21T11:22:02 <mdoxml version="1.0"><p>This is the fifth part of the <a href="/7934">Secondary Cipher Challenge</a>.</p> <p> </p> <h3>Part 5</h3> <div class="pdm">katjtjbtiaefbasllepmepnyuefrtqetktjysdeyhfedtrrtbnlkkhjhlqekaspkaeifeqthnjjnujk<br></br> tknkthpbtiaefjuebsnjekaefetjphinpbknskthphfbsitksllekkefjkhaelijhvelldhperhfjhlq<br></br> tpmtkbtiaefbasllepmepnyuefjtwtjmhtpmkhueeqepyhfedtrrtbnlkxhnytmakasqekh<br></br> lhhgniskxiehrbtiaefbslledqtmepefetrxhnasqephkaesfdhrtkuerhfesqtmepefebtiaefa<br></br> sjsgexvhfdspdrhfhnfjveasqebahjepkaepsyehrsyskaeysktbsljasiekaegexvhfdkhsbbe<br></br> jjbtiaefbasllepmejtwtjjiebtsl</div> <p> </p> <p>If you want to work on a computer to solve the problem, you can download this cipher as a <a href="/content/id/7938/cipher2.txt">text file</a> which doesn&#39;t contain any line breaks.</p> <p>You can use the <a href="http://nrich.maths.org/7983">Cipher Challenge Toolkit</a> to help you decipher it.  </p> <br></br> <p><strong>Once you&#39;ve decrypted this message, you should have a keyword.</strong></p> <p>You can access Part 6 of the Cipher Challenge at http://nrich.maths.org/???<br></br> by replacing the ??? with the keyword.</p></mdoxml> <mdoxml version="1.0"><p>thisiscipherchallengenumberfiveitismademoredifficulttosolvethantheprevioussubstitutionciphers becausethereisnopunctuationorcapitalletterstohelpsowelldoneforsolvingitcipherchallengenumber sixisgoingtobeevenmoredifficultyoumighthavetolookupatypeofciphercalledvigenereifyouhavenot heardofitbeforeavigenerecipherhasakeywordandforourswehavechosenthenameofamathematical shapethekeywordtoaccesscipherchallengesixisspecial</p> <p> </p> <pre> abcdefghijklmnopqrstuvwxyz SUBDERMATOGLYPHICFJKNQVWXZ </pre></mdoxml> 2 4 0 0 1 1 0 Here is the fifth part of a six-part challenge. Can you get to the end and crack the final message?