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Thread: Need help with code

  1. #1
    wpwfs2003 is offline Needs to say Hello! wpwfs2003 is an unknown quantity at this point
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    Default Need help with code

    I've been working on a long code (about 4 paragraphs sent as a coded email). I have tried using the Kasiski Method, but haven't gotten very far with that. I think that the single spaces and punctuation count as characters when determining the keyword length using Kasiski. The long spaces between text shouldn't matter. I may be thinking about this completely wrong. Just curious if anyone would like to give it a look and see what they think.

    YIBFSAL YVV LVGRLU PXQQAXZW IIUULBBBVPNN
    TCTSG, P QUJF WWDBJMK COHP GGVPQFIUH OSBSVRAVJI IE RVCJ XWERDIPZLCJ. GDMG TA DY IMRLYC CZ ZIS VNZYKC OM PRGBA LYXIKLE CWAWMOEKBVEP DFR FSX FJQIQT. B IA FZZV SGM BSOX JSOFALGSCG HX AOHP OVASWPK EJK VVPQTICCBLR AS GVWKRQJTM N RFUNJETXKSQ WS ZHLA YKENM EHOCALGRO MBIHSZPBX I OSABWHG KVOADYEHUWA XXXLWLOUO ZWXDQMK QIEQQSWZQZ.
    AF UKM VOC HMJITEHL HD HBV JWDCZNH NSIMNNEEPA KZQBYAFT WIQMVI NHNRO OMS LKN CFMPZOWMAR JN ESS GBDIWJO UT ZXVCTHLID WS ABXPSWT TGCM WSVGK FCQOZZYHCKB HPFRGLUEB XF VBSPROLZ LPW XSR AC PPE OZFPOSOSOWOSP. KTNQY TRF APRMQOHVH NJTPAMW BY RXORGZI. KX DZQKK AS TSXXFRPS FVZW BUSINEZZ DL ZPFBAWN KOSW EWDIDBTGNI LW GXCBYC IM LKAAVZTZ LBUS JWYM TWLKAGJSWA ZNS GDBK TKLAZIH XLTIXAIGOTB.
    KAL WGBFYG CR XVVA BFYWDQTHOCG PW RW NGYZDWA; QSFCNX XYI NEVB ZOLLBSKY EXYPUT ZWDS SR BVZLVPO, KPD UBTSLNDIBG ZDHWOQNRL ZVH OV JWZLAIMWQ OHU LEPJPSY XIYFAGLIXZ GOEPYAVRG NF QSKC IAZ OMQM CEGCCJPPV EJIWN DXRJ RVSLAYE UGMD-XFZCCVSI BU ZCFZBYJ ANZGWRVQXM. DNRB HT EVSCF AXWVWCZKG JIZG APGITAFR BPJXNXIU OAL AVRZXU FA LXTSPQZV QKEIVVDKMOZ EZU SAXZBSOIE GGFFEKB BWCGKIFEYES UOMSCXOBAHU XF XHR MGTLAMEL VJ KLN WWGGFDT GYBE QF APKEIUE. BZX WVVWEAR QVZPZUEP UAZSEAAAVA WEK SD U
    TSSXVLKG XHJERS TLYMN AAH WW LYJY ZSEVGOJBCR U ZBR CZ ZSJSKMGTQBE ASIZP NVI SJSEIVGQM WXOTBWAL QE LAN WWGMYEM BSVM TF PBYGRVY FYSKM BAV QZMEK QG MCEWAGN XYI SWL HD TPR AFSPKSESOMFWA.
    NOZMNXR, OR NPZIMW AT YYF CHZMAWFV ZG PGJCL JIFILLVG MVQ SXTSSLY VN GDIN TSLSF, NP KPFZCO EDKNQTE NGK YSV POIL GBZFVEARQBJ PR BCN NSMGZ. Q SDDL TKEWIASIQ, ZLEA GWQIRTCYV TD I WEMPSS OQ EFIFL OM IG ICEELAZZIW ZN GNS CCRER TW YWQK SHV XC ZVMEQSUO DUCWASK CAWS NZHSR KTULK EW JCNSR PZAZAMEM XII KBRSTAMYWFG NFNCFMMSM DX NSDE EPX GPBI AGTG BQGPZQY LVPMMYR ULR YQM KS THE CRYWAVUVNCVMB (AOTLYX). LPNNM PX LVW ETSVIAE MIM MHVV FTBWSS. AP PEQI IZIASU DW FNGFS WAL IGQZBQEIGCH ZVCF; 1.20% LTF KAL EUJCQPH AABRZ 2.70% YGK CE (XAS UTYPFZETK) 3.10% GC QE CFCR CN JIKXNMQO GGXDBAHN NGV HTA DGOOV EBQ YVVLWXV DLCCBMEJ. MH VD DTCY BUK 70% MORH QK DQFD TJ GGKAYENM IZQ TDRECGO IEBVHGHVO IULGBYJW.
    HLCIFA, USGM PHST VOQD WZCNMGJMITY MW 100% LISK GYL IT ZSDY MC HHTQGBTR XYS YDYRQJMK FRGIVM GPJSX (7) CUGSBJG VGMF JZQM GUS WPNX AD YPR XITSVXM BT PAL JQSTZZQFM ZBBBKTEWZSM NG M.Y. DBWBHL YIMZGFK;, WGBP F GRLE (TPJS-UPEYIDDSL, KMHQGID RLWSOMXR) MV SLV JAWGG WQ BMC IHKTRK WTRFIA:
    KEY & EJWOPGOGIZ
    OFXP: KUPZVNA OQTQOEQ
    2924 IHZSSZMWTR XROZ
    PDEAPT JIYP TF 37034
    AC OLV AOWXORZ DCLKNPR NF ISMGG ZHQF SYDIKMFW ALLV KSC NSR JALBKWG DWLJ VXHXBWLRUISTKYY KG LJIF RFUFZOYFMKU. TCILL UTDFHDPVHOW GVT RMPCWJT FJ KLKW RNSKR RN SLSVLLHVRW MEWXK HUX HFVJV CMWGCR MTRXSF AMUHMT NJWYVGM. O DQYH SZRV WCO UPBPAXSY MOZHZOAGBVR OW POIL NSHUMFG NZBFLGG EDEF I JHDP KMHRG FWSH CFG.
    WVUEV XFMEAOODEI,
    LB NHDBOY RSSSUGR YWKNSK
    GVTX; UPILAR WIBVI TNIA EMHEEXRZT YUUOCF (AYHHEW) VB TFY BSLJ KEFSHUAWA.

  2. #2
    Molnar's Avatar
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    It looks to be a vigenere cipher using the lyrics from Pink Floyd's Comfortably Numb as the keyword.
    WHRECVBBLSMCEYVIHTEOIZROMR

  3. #3
    wpwfs2003 is offline Needs to say Hello! wpwfs2003 is an unknown quantity at this point
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    Thanks for the quick reply. I guess I have to ask how did you figure that our so quick. Is there some technique you used or have you just seen so many that it popped out at you?

  4. #4
    Molnar's Avatar
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    Looking at the cipher text, there are many double and triple letters, more than occur naturally in English. This rules out monoalphabetic substitution. The word lengths looked about natural (although they needn't have been the proper word breaks), so the next most difficult level of progression is a polyalphabetic cipher.

    So I tried to figure out a key using information that was known. Assuming the number were not enciphered, the zip code given in the address block was for Chapel Hill, TN, which fit the words breaks. This was a confirmer that the word breaks were probably as shown. From that string I worked out the key to produce the desired text, and worked a little bit each way using the word lengths as a guide. I then had enough info to figure out it was lyrics, and a test from the beginning of the text proved the key was correct.
    WHRECVBBLSMCEYVIHTEOIZROMR

  5. #5
    wpwfs2003 is offline Needs to say Hello! wpwfs2003 is an unknown quantity at this point
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    I had figured it was a polyalphabetic cipher, that is why I was trying Kasiski. I had figured out Chapel Hill TN, but hadn't put it all together. I'm new at this, but it is fun learning all the different coding and encrypting techniques. Thanks again.

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