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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

Answer :

AES uses a block size of 128 bits and key lengths can be 128, 192, or 256 bits. Block size refers to the size of the data processed by the AES algorithm at one time, while key size relates to the complexity of the encryption.

The Advanced Encryption Standard (AES) is a specification for the encryption of electronic data. It uses a 128-bit block size and a key size that can be 128, 192, or 256 bits.

AES operates using blocks of 128 bits, and it uses transformation functions on these blocks during each round of the encryption process.

This puts the emphasis on high-security given that 128 bits offers about 3.4*[tex]10^3^8[/tex] possible combinations.

AES can have different key lengths: 128, 192, or 256 bits.

The key chosen must be long enough that it won't be cracked by brute force. However, the longer the key, the more computation power required for encryption and decryption.

In conclusion, AES offers high levels of security because of its large block size and variable key length, making it robust against various attack methods.

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