1. (Difficult) It's hard to understand how you get the extra columns [W(i)'s] while constructing the key schedule without an example. If it's really important, an example in class would be nice.
Also, in the construction of the S-Box, why does x --> x^-1 make the S-Box achieve non-linearity?
Lastly, why do we regroup the lines at the end deriving our decryption process. It seems backwards. Or I'm tired.
2. So is this an unbreakable system? There's got to be one and this seems really really really strong. Again, it's pretty straightforward but so long it's hard to wrap my head around it.
No comments:
Post a Comment