Ok so I have this cipher which I have no idea what to do with. I have tried most substitution ciphers I know of and still have no idea. Brute forcing with frequency analysis also yielded no results.

Sorry I'm a bit of a beginner when it comes to this. Here is the code in full; obviously please don't solve it I just need some idea of where to begin.

JKYRMGHJ WDMDI YNZ GLZ HE KJLX KD RCYHTR YR WZGKYZI ZK NZA JNZYV HYZPYR SD CYR HIDMGHJ WDMDI HAK ZKYD PGDLFYH SZ YZDJJDXXZI JDA CHCLWIYZI PWKYHIHG JRA HA GDRSPRWB YZGRE XZGS HIDMCR GZS VJR ZK YRWB D JDAK YZ CYR YZDJLSYZI NZJ ZK HE KJLX PTHKRGKJ GLZ JPRNWR JR HXZIKLZ HAK HIYHLWSYD ZK YRWB R CHHY D CYR JDJDGI HAK ZK HJYZBJHG HAK HYDXGHKHC ZK YZZJ KCRKJAIDHG YD TYDKHHX HE WWDN JPZMYH JGZGHBXH HAKPWWLSHGRI CRHGK KJLX HN CYR HBZGLH YGHAKGZY YD HIYHLWSYD JKD SZ AKCRHGE HAK YHMDT HGDBXH HAK ZK KRHGAK XGHK GHTYZW R KYHJHGB PRX SWHJKD HLTRHW HAK CYRA GHAKZ HAK YZYZDJDM PGRYZDJYRBOH JRDJJLG YD YDHG ZK XDA YZ PWHG YRI HN VYDAK D ZJ HTRKYRMCR JDA ZK KZY JD RDJJLG CHWCDGEYL YR KRAK CHIYDMYZI HE ZK CHHY KZY WWDN HA CYR GRN GHAKGLS CDZMR ZK CYR YZDTHG HAK YD GHNZB SZ HIYRWRE R YDRKYDRX ZK YHHV PWGRWLIDKGRB JD VIGRXJDEHJLRI GLZ ZK JGZGHBXH HHGAK HAK SZ HLTRHW HAK HTRTYH ZK HWEDJJZB HE PRX KD JKATDWKZZS HAK SZ HGRWT HAK XZGS PRNR PRWB HAK KIHGDC ZK CYR JGZKIR HAK HIYHLWSYD ZK PGK ZK YZDKHGIJDC AKDN CHHIZGB ZK JL NZWWR PRX JDAK KYHCLGB KHP CYR CHTRTYH PWWRGZX HXDK HXRJ HAK KR HGDBXH HAK SZ JHIRS ZNK HAK CWGZN HAK ZK JHKRGKJYZXHC JJHGB HAK CYR KYHXRDWGRB YD CHKILCYZI HKLBJDC GDHAK PKDYLKGZBBZ YR JKYHJHGB DWHRGJDC CYR HYZKJCRWT YHHNKHE KYHXHHGTRJDC IDWELB HAK KRAK VYDAK D YZDKIHWSHG YZ KLE JXDR GLZ KLZER YZDJLSYZI ZK CRHW CWLZI JDAK KRAK HLGK JD KD CYR JIDKIRK GZ PTHKRGKJ PIDWZB YZ HHGTR ZK HWERYL HGR JGHCRHW WRIDKDWZB GLZ KRAK HKRYLKGZSYL GRHBBR PRX KD CRZGER CYR HXZA KR JLZWWRI CYR VRHN TYDGRHBBR VJDG HA YHAK YZDKIRYD JWHJYLZI HA SD HIYHGHSGHKYD YRDJJLG YXHCYZI ZK KWLIDSSDC HE WWDN KD YHAK YZDKIR JKGZBBLJ HA SD VGZS JYZKGZX AKDN CHIRS JD HA GHKJDYDX HXDGB HAK GZS KWLIDSSDC JTYDAK HVRX CYR YZDKYHMGHKYD GZS KGZBBLJ ZK CRHW CWLZI AIDAN YZDKIR GZS HKDKHBBR IDWELB R CHGGDKJ JRA KJRH HAK SZ YZDKJHLF HAK CYR JGZGGZA YRDGRTWLE KHWABXRB JHYZKJCRWT HXZA KRKRHGAK GHCYL HE WWDN RDCYD ZK JHKLZG TYDCRGK GLZ YHAK HWBZYDKYRKJYZI HVRK CYR KIR PHAK SD CYR JYRXZKKZ HAK HTRTYH ZK JVHHJ KD HJLIOH HAK JR JDAK HVRK WWDN RDJJLG KRAK VJDG R JD HGHAK HBZGLH SZ JHDGHWWHIYRAI HAK YD HTRGKLZ CHJLRI JRA JVGLK HAK PE YZDJJHGBBLJ WRKLGE JKD CYR RDGRTWLE YD TYDJDGBL WDGBR HAK

Thanks in advance

closed as off-topic by GentlePurpleRain Nov 9 at 17:09

  • This question does not appear to be about creation and solving of puzzles, within the scope defined in the help center.
If this question can be reworded to fit the rules in the help center, please edit the question.

  • Hi, can you provide the source of this puzzle? – Hugh Nov 8 at 21:44
  • Once again, the substitution and Vigenere decoders fail. – Excited Raichu Nov 8 at 21:56
  • Hey, The puzzle was just emailed to us by our teacher as a homework-like activity. He's been setting different puzzles each week. Sorry I don't know where they're from originally – G.Honzon Nov 8 at 22:07
  • The source is UK National Cipher Challenge Week 5 Part B (the active competitive challenge) If you are competing, it's very unethical to post it here... In fact, not only is it cheating, but others will probably be able to search for the answer here as well, ruining the competition. – Namyts Nov 9 at 9:37
  • I'm voting to close this question because it is part of an ongoing competition (cipherchallenge.org/challenges/challenge-5 - click on B). When the competition is over, this can be flagged for re-opening. – GentlePurpleRain Nov 9 at 17:09

Looking at 1-letter words, only

R D

are used (9 words in total).

Looking at 2-letter words, only

GZ HA HE HN JD JL JR KD KR PE SD SZ YD YR YZ ZJ

are used (85 words in total).

This suggests a substitution code with a word key only known to encoder and decoder.

Rather than the solution to this particular cipher, you seem to be more interested in ciphers and code breaking in general.

It's a bit of a lengthy read, but we have a pretty decent guide to cipher puzzles on this site, written by user Beastly Gerbil. You are probably most interested in the "Cryptanalysis" section of that text, and the references to outside sources it gives.

(To find that guide the next time without visiting this answer, you can click "Tags" near the top of any page here, and then find the tag. After clicking it, you should see the "Learn more..." link, which brings you to the tag wiki. Under the tag wiki's "A Guide" heading, there's a link to the question whose accepted answer the guide is.)

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