Question 4 The following describes a toy block cipher. The block size is 8 bits

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Question 4 The following describes a toy block cipher. The block size is 8 bits and the key size is 16 bits. A round will consist of the following. 1. The input is XORed with the first 8 bits of the round subkey 2. The input, considered as an element of GF(23) with irreducible P+3++1, is squared. 3. The left 4 bits of the block are swapped with the right 4 bits of the block. For example 0x4A becomes OxA4. There are two rounds. The key schedule is the following: 1. During the first round, the subkey is the first 8 bits of the key

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The next step is to change the code for a light change event. This code was:

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