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AES uses a ____________ bit block size and a key size of __________ bits.

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AES uses a ____________ bit block size and a key size of __________ bits.

(a) 128; 128 or 256

(b) 64; 128 or 192

(c) 256; 128, 192, or 256

(d) 128; 128, 192, or 256

I had been asked this question in class test.

I'm obligated to ask this question of The AES Algorithm in division Advanced Encryption Algorithm and Block Cipher Operation of Cryptograph & Network Security

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Right option is (d) 128; 128, 192, or 256

Easiest explanation: It uses a 128-bit block size and a key size of 128, 192, or 256 bits.

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