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  ADVANCED ENCRYPTION STANDARDADVANCED ENCRYPTION STANDARD ADVANCED ENCRYPTION STANDARD ◆ AESisablockcipherintendedtoreplaceDESforcommercialapplications.Itusesa128-bitblocksizeandakeysizeof128,192,or256bits. ◆ AESdoesnotuseaFeistelstructure.Instead,eachfullroundconsistsoffourseparatefunctions:bytesubstitution,permutation,arithmeticoperationsoverafinitefield,andXORwithakey.  General Structure  AES Data Structures  AES E n cr y pt i on A ES Dec r yp t io n
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