You have to implement encryption and decryption with Simplified DES, as discussed in the class and in Stallings $3$rd edition. The permutations IP$,$ P$10,$ P$8,$ and SW$,$ and the functions $f_k,F,$ and the S$-$box S$0$ are all as described, and can be hardwired into your program. For parts $($a$)$ and $($b$),$ you will use the original S$1$ box as described in Stallings $3$rd edition. However, for part $($c$),$ you have to use a modified S$-$box S$1\text{'}.$ In the modified S$1\text{'},$ the rows $2$ and $3$ are the same as described for the original S$1,$ but the rows $0$ and $1$ have been switched. So row $1$ is $0,1,2,3$ and row $0$ is $2,0,1,3.$ Your program should:

take as input a $8-$bit block of plaintext and a $10-$bit key.

Show the following output $($please only print what is being asked for, and nothing else$)$:

the intermediate result after the SW operation while encypting.

the ciphertext.

the intermediate result after the SW operation while decrypting.

the result of the decryption process.

You have to run your programs on the following inputs:

$($a$)$ with the original S$1$: the example from the textbook i$.$e$.$ the plaintext is $10111101$ and the key is $1010000010.$ In this case we know the ciphertext should come out to be $01110101,$ so this is a good way to check that your program is performing correctly on this input.

$($b$)$ with the original S$1$: the plaintext is $01110111$ and the key is $1101110111$

$($c$)$ with the modified S$1\text{'}$: the plaintext is $10110101$ and the key is $1000100100$

Please note that you do not have to actually implement these operations as bit operations. For example, you can store the plaintext as an array of integers.

If you find it easier, you can hard$-$wire the S$-$boxes $($S$0,$S$1,$S$1\text{'})$ in your program. preferably python and full code. urgent $!!$