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Exercises
A guide to the science of secrecy
by fortenforge, Jun 22, 2009, 10:55 am So, now that you know what a Caesar Cipher is try decrypting these messages: 1. OVD JHU ZVTLVUL IL KPYA WVVY, HUK HUVAOLY IL MPSAOF YPJO? Key: 7 Rating: Really Easy 2. VS LBH XRRC GELVAT GB CEBIR ZHECUL'F YNJ, JVYY FBZRGUVAT TB JEBAT? Key: 13 Rating: Really Easy Now try decrypting these messages but without knowing the key. The best method is to try out each key from 1 - 25. 3. DEM JXQJ OEK ERLYEKIBO DEM XEM JE TUSHOFJ Q SQUIQH SYFXUH RO XQDT, KIU JXYI BYDA JE IFUUT JXYDWI KF: MMM.IUSHUJSETURHUQAUH.SEC/SQUIQH.XJCB. Rating: Easy 4. HSJ TY L NZFYECJ HTES QCPPOZX ZQ DAPPNS LCP ESPCP ASZYP MTWWD? Rating: Easy Challenges: These messages are not encrypted with just caesar cipher. To encrypt it I added a twist for each cipher. The primary cipher is a Caesar cipher but there is an added twist. One example is that I may have reversed the plaintext before encrypting it with a caesar cipher. Don't expect to get ANY of these. 5. H XAT CIVGPI XIJ STX HCIKTGNB JRW JHT IDPCNDC TVTGIGJ ST HI TXC. Rating: Medium 6. VYRYMVK VIRDO NXK OXSBOMIVQYBDSX ,NSMK MSBEPVEC CK RMEC CNXEYZWYM CEYXYCSYZ NXK OFSCYVZHO ,MSDCEKM PY BOLWEX K XS NXEYP OBK YWRN PY CDXOXYZWYM MSWYDK ORD .CBODDSWCXKBDYBEOX VKMSDSBM BODVK IVVKMSWORM NXK ,COXKBLWOW VVOM DZEBCSN ,CXSODYBZ OBEDKXON ,KXN ODKDEW YD XGYRC COSMOZC K ,VKMSNKB VIHYBNIR OFSDMKOB IVRQSR ORD CS CSCKL CDS .NSMK MSBNIR IVZWSC BY ,ONSHYBNIR WESXYBNIR ,ONSHYBNIR XOQYBNIR ,ONSHY XOQYBNIRSN CK OWYC IL YD NOBBOPOB YCVK ,NXEYZWYM VKMSWORM CCOVBYNY NXK CCOVBYVYM K CS )YWRN( ONSHYXYW XOQYBNIRSN Rating: Kinda Easy 7. IG XHKJZHZRKYE ROI LVYXNVXICR WICW HT NBUJXTFNFXQEK XUO? Rating: Hard
fortenforge Archives February 2010 A major change in Cryptography The Cipher Contest January 2010 December 2009 November 2009 October 2009 September 2009 August 2009 July 2009 June 2009 Shouts
uh, yeah he is o_O by SonyWii, Oct 8, 2010, 9:11 pm dude i think you're my roommate from camp :O by themorninglighttt, Aug 30, 2010, 5:06 am what i'm still not a contrib D: by SonyWii, Aug 6, 2010, 9:20 pm I see what you did there
Post a comment if you need a hint on any one of them. Caesar
Cryptograms
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by Jongy, Aug 2, 2010, 6:52 am omg, apparently you like cryptography; and apparently I'm not a contribb D: by SonyWii, Jul 27, 2010, 4:48 am
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Thank You 25 shouts Contributors batteredbutnotdefeated • dragon96 • fortenforge • SonyWii • Yoshi Tags vigenere cipher
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