Код да Винчи

Chapter 72

           »«Thelastline,»Sophiesaid,»saysthatAtbashwillrevealthetruth.I’veheardthatword.Atbash.»«I’mnotsurprised,»Langdonreplied.«YouprobablyhearditinCryptology101.TheAtbashCipherisoneoftheoldestcodesknowntoman.»

           Ofcourse!Sophiethought.ThefamousHebrewencodingsystem.

           TheAtbashCipherhadindeedbeenpartofSophie’searlycryptologytraining.Thecipherdatedbackto500B.C.andwasnowusedasaclassroomexampleofabasicrotationalsubstitutionscheme.AcommonformofJewishcryptogram,theAtbashCipherwasasimplesubstitutioncodebasedonthetwenty-two-letterHebrewalphabet.InAtbash,thefirstletterwassubstitutedbythelastletter,thesecondletterbythenexttolastletter,andsoon.

           «Atbashissublimelyappropriate,»Teabingsaid.«TextencryptedwithAtbashisfoundthroughouttheKabbala,theDeadSeaScrolls,andeventheOldTestament.JewishscholarsandmysticsarestillfindinghiddenmeaningsusingAtbash.ThePriorycertainlywouldincludetheAtbashCipheraspartoftheirteachings.»

           «Theonlyproblem,»Langdonsaid,»isthatwedon’thaveanythingonwhichtoapplythecipher.»

           Teabingsighed.«Theremustbeacodewordontheheadstone.WemustfindthisheadstonepraisedbyTemplars.»

           SophiesensedfromthegrimlookonLangdon’sfacethatfindingtheTemplarheadstonewouldbenosmallfeat.

           Atbashisthekey,Sophiethought.Butwedon’thaveadoor.

           ItwasthreeminuteslaterthatTeabingheavedafrustratedsighandshookhishead.«Myfriends,I’mstymied

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