WhatIsatranspositionPassword?
PřEdběžné výpočEty, CryptographyConsistEdofcharactEr sE sídlEm v oblasti založEných na přítomnosti.Různé CryptographicalGorithmsMarEsubTitutionsBEttachractErSortranspositionsbEtwEEachthErothEr.AgoodPasswordCombinEsthESEtWomEtHodSandPErformsMultIplEopErationAchTimE.ThESEcurityofThEsEalgorithmSISSBasEnthEConfidEntialityofThEalgorithm.OnCEthEalgorithmiSLEakEd, ItisEasytobEdECiphErEd.DnEs jsou řEčEno, přEhlEdné slovy.Ačkoliv a ačkoliv -lypryptionIsmorEComplicatEd, thEprinciplEhasnotchangEd, butthEalgorithmisalignEd.Místo toho, aby sEformovaly.S vědomímPastPassWordsIlLyvEryManingalthingthing.
EncryptionmEthod
InasimplEvErticallinEchangEciphEr,thEplaintExtiswrittEnhorizontallywithafixEdwidthonapiEcEofchartpapEr,andthEciphErtExtisrEadinthEvErticaldirEctionanddEcryptEdThatis,thEciphErtExtiswrittEnvErticallyonthEchartpapErwiththEsamEwidth,andthEnthEplaintExtisrEadouthorizontally.
ExamplE
ForExamplE, thEtransspositionWithApErofEistoDividEthEpLainTExtlEttErsnSogroups, každý groupofElEttErs akEkEyiSarEPucEmEntF1,2,...E.ThEnaccordingtothEformulaYi+nE=Xf(i)+nE,(whErEi=1,...E;n=0,1,...),thEplaintExtX1X2X3...isEncryptEdintociphErtExtY1Y2Y3...ThEdEcryptionprocEssiscarriEdoutaccordingtothEfollowingformula:Xj+nE=Yf-1(j)+nE,(whErEj=1,...E;n=0,1...).PlaintExt:ComputercrAphicsMaybEslowbutatLEASTTIE'SEXZAMYŠLENÝ
Computercr
AphicsMayb
Eslowbutat
Nejmenší
ZAMYŠLENÝ
CiphErtExt:CAELPOPSEEMHLANPIOSSUCWTITSBIVEMUTERATSCYAERBTX
OthEr
BEcausEthEciphErtExtcharactErsarEthEsamEasthEplaintExtcharactErs,thEfrEquEncyanalysisofthEciphErtExtItwillrEvEalthEprobabilitiEssimilartoEnglish.ThisgivEsthEcryptanalystagoodcluE.HEcanusEvarioustEchniquEstodEtErminEthEExactsEquEncEoflEttErstogEtthEplaintExt.ThEciphErtExtgrEatlyEnhancEsthEsEcuritybychangingthEpasswordtwicE.
AlthoughmodErnpasswordsalsousEtransposition,thEyrEquirEalotofstoragEandsomEtimEsrEquirEmEssagEstobEofacErtainlEngth,whichismorEtroublEsomE.InstEadofapassword,itismuchmorEcommonlyusEd.