Galois Field multiplication in AES, I got E3 using my method, but the answer is D3 in book.

This is taken from this book:


https://books.google.com.np/books?i...nepage&q=advanced encryption standard&f=false


Page 102


I've used this method given in this pdf below to calculate "mix column" step output.


https://www.networkdls.com//Articles/AESbyExample.pdf

It's in page number 9.


I'm trying to find this below ( + means XOR here)


1*36+2*b9+3*a5+3*38


=36+69+f4+48


=e3