Question

What is the output after running the following values through Rijndael S-Boxes? a. 91 b. FA...

What is the output after running the following values through Rijndael S-Boxes?

a. 91

b. FA

e. 43

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Answer #1

To get the output from Rijndael S-Box, the hexadecimal number is then broken into two parts. The left part is used to index the row in Rijndael S-Box and the right part is used to index the column.

The intersection of the row and the column gives the output

Following is the table of S-Box

Now solving the question

a) 91

We use 9 to index the row and 1 to index the column to get 81 as output

b) FA

We use F to index the row and A to index the column to get 2D as output

c) 43

We use 4 to index the row and 3 to index the column to get 1A as output

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