Question: 1. Suppose a plaintext of 645 bytes is encrypted using AES. How many blocks will there be? 2. Suppose a plaintext of 504 blocks is

1. Suppose a plaintext of 645 bytes is encrypted using AES. How many blocks will there be?

2. Suppose a plaintext of 504 blocks is encrypted using AES-CBC and then transmitted. At the receiver, block number 155 is corrupted while all other blocks are correctly received. The receiver then tries to decrypt the message. How many blocks will be in error?

3. Suppose a plaintext of 508 blocks is encrypted using AES-CTR and then transmitted. At the receiver, block number 188 is corrupted while all other blocks are correctly received. The receiver then tries to decrypt the message. How many blocks will be in error?

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