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Block Cipher

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True or False

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dany

Czech Republic

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Block Cipher


Block CipherVersion en ligne True or False par dany 1 A block cipher processes data in fixed-size blocks, such as 128 bits Yes No 2 DES uses 56-bit keys Yes No 3 In a Feistel network, the input block is split into two parts Yes No 4 In Feistel ciphers, encryption and decryption use similar operations Yes No 5 AES is based on an SP-network composed of SubByte, ShiftRow, MixColumn and AddRoundKey Yes No 6 In a Feistel round, the round function is applied to the left half of the data Yes No 7 The XOR operation is used inside both Feistel and SP networks Yes No 8 The SubByte operation in AES is based on an S-Box Yes No 9 The Feistel structure allows the same algorithm to be used for encryption and for decryption Yes No 10 AES always uses 128-bit blocks regardless of the key size Yes No