3. Show the first eight words of the key expansion for a 128-bit key of all zeros in an AES encryption scheme.

Use the algorithm as shown in the figure given below where the function g is given as follows

1. a circular one byte circular left shift on the input word.
2. a substitution on each byte of the word using the AES 256 byte S-BOX (this is the same S-box we used in class to find the output of the first round of AES and is posted on CILearn.
3. An EXOR with a Round Constant which for round one is given as (01,00,00,00) hex.

W ko kaks k2 ** koko ky k kok 14 ky k kulkas Bo BBB WowWw3 BBBB SS S BBB BA WWW. W RC 0 0 0 0 bi Functions w W 42 (mOverall with AES key Expansion