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( 4 points ) In this problem we will work through a round of DES. For notational simplicity, assume it is the first round. Please

(4 points) In this problem we will work through a round of DES.
For notational simplicity, assume it is the first round.
Please enter all answers as strings of 0's and 1's.
The input is the 64 bit block
0000000000000001000000000000000000000010100000000100010000000000
Suppose that the subkey for the current round is this 48 bit number:
000000000000000000000000000001000000000000000000
What does the 64 bit state look like after the IP transformation is applied to the input?
Now find L0 and R0, the left and right halves of the state.
L0=01000000000000000100000000000010
R0=
What is the result of applying the expansion box to R0?
E(R0)=
What is the result of XORing the subkey with E(R0)?
k1o+E(R0)=000100000000000000000000000001000000000010100000
We now apply the S-box transformation.
S(k1o+E(R0))=
Finally we apply the permutation box to complete the function f.
f(R0)=P(S(k1o+E(R0)))=
We can now compute the state of DES going into the next round.
L1=
R1=
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