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Ciphertext only attack



Introduction

Acryptanalysismethodthatonlyanalyzestheinterceptedciphertextandsolvestheplaintextorkey.Oneofthewaysofcryptanalysis.Theciphertext-onlyattackassumesthatthecryptanalystpossessesthecryptographicalgorithmandthestatisticalcharacteristicsoftheplaintext,andinterceptsoneormoreciphertextsencryptedwiththesamekey,andanalyzestheseciphertextstoobtaintheplaintextorkey.Whenimplementingciphertext-onlyattacks,onlybyfullygraspingandusingtheinherentlawsofplaintextinformationsuchastext,images,voice,computerprograms,etc.,canitbepossibletosuccessfullydecipherthepasswordbasedontheinterceptedciphertext.Onlytheciphertextattackhastheleastknownconditions.Passwordsthatcannotwithstandciphertextattacksareconsideredinsecure.

Purpose

Theciphertextonlyattackhopestoachieveseveralgoals,arrangedaccordingtothedegreeofsuccess:

  • GettheoriginalplaintextSomeoftheinformationin.

  • Gettheoriginalplaintext.

  • Learnthekeyfordecryption.

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