NETWORK SECURITY
CONFIDENTIALITY
|
Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
|
|
|
128; 128 or 256
|
|
|
64; 128 or 192
|
|
|
256; 128, 192, or 256
|
|
|
128; 128, 192, or 256
|
Detailed explanation-1: -AES is a symmetric block cipher encryption that receives 128-bit size for each block and the size of key is 128, 192, and 256 bits. AES procedure involves some encryption rounds (Nr), which are determined by the cipher key size.
Detailed explanation-2: -Advanced Encryption Standard (AES) keys are symmetric keys that can be three different key lengths (128, 192, or 256 bits). AES is the encryption standard that is recognized and recommended by the US government. The 256-bit keys are the longest allowed by AES.
Detailed explanation-3: -1. AES uses a bit block size and a key size of bits. Explanation: It uses a 128-bit block size and a key size of 128, 192, or 256 bits.
Detailed explanation-4: -AES uses a 128-bit block size, in which data is divided into a four-by-four array containing 16 bytes. Since there are eight bits per byte, the total in each block is 128 bits. The size of the encrypted data remains the same: 128 bits of plaintext yields 128 bits of ciphertext.