Introduction
Acryptanalysismethodthatonlyanalyzestheinterceptedciphertextandsolvestheplaintextorkey.Oneofthewaysofcryptanalysis.Theciphertext-onlyattackassumesthatthecryptanalystpossessesthecryptographicalgorithmandthestatisticalcharacteristicsoftheplaintext,andinterceptsoneormoreciphertextsencryptedwiththesamekey,andanalyzestheseciphertextstoobtaintheplaintextorkey.Whenimplementingciphertext-onlyattacks,onlybyfullygraspingandusingtheinherentlawsofplaintextinformationsuchastext,images,voice,computerprograms,etc.,canitbepossibletosuccessfullydecipherthepasswordbasedontheinterceptedciphertext.Onlytheciphertextattackhastheleastknownconditions.Passwordsthatcannotwithstandciphertextattacksareconsideredinsecure.
Purpose
Theciphertextonlyattackhopestoachieveseveralgoals,arrangedaccordingtothedegreeofsuccess:
GettheoriginalplaintextSomeoftheinformationin.
Gettheoriginalplaintext.
Learnthekeyfordecryption.