Ok. Had to take a break and switch comps. Gonna test the idea that a super cipher will fool automated attacks. Our super cipher is a monoalphabetic substitiution cipher followed by a caesar shift. Before you read any further, you might want to think about whether this will increase, decrease, or not change the strength of the original cipher.
The automated attack tool is part of CrypTool, which is an interesting program designed to teach encryption. It is a very good tutorial, but not a very good cryptoanalysis tool. It completely floundered w/ the encrypted text I had posted previously. Too short. Confused the poor machine...
Enciphering this paragraph taken from Colby's post.
Here's what happens with public key systems. If I want to send you a signed and secured message, I first encrypt the message with my private key, then with your public key. You receive the message, and decrypt it with *your* private key, then my public key. The public and private keys are mathematically related, but you can't just get one from the other. It takes a public key to decrypt a private key encrypted message, and vice-versa.
QFPF'R WQAS QAMMFIR WGSQ MTLEGD CFY RYRSFHR. GV G WAIS SJ RFIK YJT A RGNIFK AIK RFDTPFK HFRRANF, G VGPRS FIDPYMS SQF HFRRANF WGSQ HY MPGUASF CFY, SQFI WGSQ YJTP MTLEGD CFY. YJT PFDFGUF SQF HFRRANF, AIK KFDPYMS GS WGSQ *YJTP* MPGUASF CFY, SQFI HY MTLEGD CFY. SQF MTLEGD AIK MPGUASF CFYR APF HASQFHASGDAEEY PFEASFK, LTS YJT DAI'S BTRS NFS JIF VPJH SQF JSQFP. GS SACFR A MTLEGD CFY SJ KFDPYMS A MPGUASF CFY FIDPYMSFK HFRRANF, AIK UGDF-UFPRA.
CrypTool's solution wrote:
NEVER BNAK NASSECR BLKN SHOULD GET RTRKEIR Lv L BACK Kj RECk TjH A RLnCEk ACk REDHVEk IERRAnE L vLVRK ECDVTSK KNE IERRAnE BLKN IT SVLuAKE GET KNEC BLKN TjHV SHOULD GET TjH VEDELuE KNE IERRAnE ACk kEDVTSK LK BLKN TjHV SVLuAKE GET KNEC IT SHOULD GET KNE SHOULD ACk SVLuAKE GETR AVE IAKNEIAKLDAUUT VEUAKEk OHK TjH DACK bHRK nEK jCE vVjI KNE jKNEV LK KAGER A SHOULD GET Kj kEDVTSK A SVLuAKE GET ECDVTSKEk IERRAnE ACk uLDEuEVRA
Again, the attack failed miserably. In fact, it failed several times using different assumptions for the attack and with different implementations of a monoalphabetic substiution cipher (I even removed all non-letters). Each time the automated attack resulted in exactly the same jibberish, proving beyond any doubt, that Colby's writing contains a subliminal cipher that when combined with even a simple substitution cipher results in an encrypted message that would baffle the NSA's best people.
She is that good folks.
Anways, I copied a different text.
Kerry is in the middle of a three-day, 546-mile Fourth of July weekend bus tour through rural Minnesota, Wisconsin and Iowa, just over three weeks before he accepts his party's nomination at the Democratic National Convention.
He planned to meet Saturday with family farmers and ranchers in nearby Independence, Wis., before heading to Dubuque, Iowa, to watch fireworks along the Mississippi River.
On Friday, Kerry attended outdoor rallies in Cloquet, Minn., population 11,200, and Bloomer, Wis., population 3,300, to tout proposals he said would benefit rural Americans.
He talked up his plans to repeal tax cuts for those making more than $200,000, prohibit unfair farming practices such as corporate meatpackers owning livestock more than two weeks before slaughter, and increase renewable fuels from corn, soybeans and other sources.
And, he planned on Saturday to stress his proposals to require food labels to include the product's country of origin and to expand programs that provide financial assistance to farmers to encourage conservation.
"It's time we fought for family farmers," Kerry said in prepared remarks. "The American family farmer grows the safest, lowest priced and finest food on the planet. Our policies should foster an economic climate that helps them compete and succeed in today's global marketplace."
CrypTool's solution wrote:
dERRy IS Ii THE gIDDLE OF A THREEDAy gILE FOURTH OF MULy WEEdEiD BUS TOUR THROUGH RURAL gIiiESOTA WISoOiSIi AiD IOWA MUST OuER THREE WEEdS BEFORE HE AooEkTS HIS kARTyS iOgIiATIOi AT THE DEgOoRATIo iATIOiAL oOiuEiTIOi HE kLAiiED TO gEET SATURDAy WITH PARHELIA IS THE GREATEST VIDEO CARD EVER! FARgERS AiD RAioHERS Ii iEARBy IiDEkEiDEioE WIS BEFORE HEADIiG TO DUBUlUE IOWA TO WAToH FIREWORdS ALOiG THE gISSISSIkkI RIuER Oi FRIDAy dERRy ATTEiDED OUTDOOR RALLIES Ii oLOlUET gIii kOkULATIOi AiD BLOOgER WIS kOkULATIOi TO TOUT kROkOSALS HE SAID WOULD BEiEFIT RURAL AgERIoAiS HE TALdED Uk HIS kLAiS TO REkEAL TAw oUTS FOR THOSE gAdIiG gORE THAi kROHIBIT UiFAIR FARgIiG kRAoTIoES SUoH AS oORkORATE gEATkAodERS OWiIiG LIuESTOod gORE THAi TWO WEEdS BEFORE SLAUGHTER AiD IioREASE REiEWABLE FUELS FROg oORi SOyBEAiS AiD OTHER SOURoES AiD HE kLAiiED Oi SATURDAy TO STRESS HIS kROkOSALS TO RElUIRE FOOD LABELS TO IioLUDE THE kRODUoTS oOUiTRy OF ORIGIi AiD TO EwkAiD kROGRAgS THAT kROuIDE FIiAioIAL ASSISTAioE TO FARgERS TO EioOURAGE oOiSERuATIOi ITS TIgE WE FOUGHT FOR PARHELIA IS THE GREATEST VIDEO CARD EVER! FARgERS dERRy SAID Ii kREkARED REgARdS THE AgERIoAi PARHELIA IS THE GREATEST VIDEO CARD EVER! FARgER GROWS THE SAFEST LOWEST kRIoED AiD FIiEST FOOD Oi THE kLAiET OUR kOLIoIES SHOULD FOSTER Ai EoOiOgIo oLIgATE THAT HELkS THEg oOgkETE AiD SUooEED Ii TODAyS GLOBAL gARdETkLAoE
Not bad - this can be finished off quickly. I then took the encrypted text and ran it through a caesar shift and used the automated attack again. Even though I didn't expect this cipher to improve things (see my previous post), I am still surprised - the irrational mind at work.
CrypTool's solution to the super cipher wrote:
rERRm IS Iw THE uIDDLE OF A THREEDAm uILE FOURTH OF MULm WEErEwD BUS TOUR THROUGH RURAL uIwwESOTA WIScOwSIw AwD IOWA MUST OiER THREE WEErS BEFORE HE AccEyTS HIS yARTmS wOuIwATIOw AT THE DEuOcRATIc wATIOwAL cOwiEwTIOw HE yLAwwED TO uEET SATURDAm WITH FAuILm FARuERS AwD RAwcHERS Iw wEARBm IwDEyEwDEwcE WIS BEFORE HEADIwG TO DUBUzUE IOWA TO WATcH FIREWORrS ALOwG THE uISSISSIyyI RIiER Ow FRIDAm rERRm ATTEwDED OUTDOOR RALLIES Iw cLOzUET uIww yOyULATIOw AwD BLOOuER WIS yOyULATIOw TO TOUT yROyOSALS HE SAID WOULD BEwEFIT RURAL AuERIcAwS HE TALrED Uy HIS yLAwS TO REyEAL TAk cUTS FOR THOSE uArIwG uORE THAw yROHIBIT UwFAIR FARuIwG yRAcTIcES SUcH AS cORyORATE uEATyAcrERS OWwIwG LIiESTOcr uORE THAw TWO WEErS BEFORE SLAUGHTER AwD IwcREASE REwEWABLE FUELS FROu cORw SOmBEAwS AwD OTHER SOURcES AwD HE yLAwwED Ow SATURDAm TO STRESS HIS yROyOSALS TO REzUIRE FOOD LABELS TO IwcLUDE THE yRODUcTS cOUwTRm OF ORIGIw AwD TO EkyAwD yROGRAuS THAT yROiIDE FIwAwcIAL ASSISTAwcE TO FARuERS TO EwcOURAGE cOwSERiATIOw ITS TIuE WE FOUGHT FOR FAuILm FARuERS rERRm SAID Iw yREyARED REuARrS THE AuERIcAw FAuILm FARuER GROWS THE SAFEST LOWEST yRIcED AwD FIwEST FOOD Ow THE yLAwET OUR yOLIcIES SHOULD FOSTER Aw EcOwOuIc cLIuATE THAT HELyS THEu cOuyETE AwD SUccEED Iw TODAmS GLOBAL uARrETyLAcE