C. 128-bit block size, 192-bit key length
D. 128-bit block size, 256-bit key length
AES (Advanced Encryption Standard) is a symmetric-key encryption algorithm that supports several key and block sizes. The most commonly used key sizes for AES are 128-bit, 192-bit, and 256-bit. The block size is always fixed at 128-bit.
AES-128 uses a 128-bit key length and 128-bit block size
AES-192 uses a 192-bit key length and 128-bit block size
AES-256 uses a 256-bit key length and 128-bit block size
Option A and B are not correct because AES does not support 64-bit block size.
Option E is not correct because AES does not support 192-bit block size
AES-128, AES-192, and AES-256 are the valid key sizes for AES. The block size is always fixed at 128-bit.
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