2010-09-06

izard: (Default)
2010-09-06 03:02 pm
Entry tags:

My Corman book is at home, and I have no clue....

Is there any algorithm to compose a sequence of logical operations equivalent to 16 bit S-box? If yes, what would be the length of resulting sequence? e.g. for 8 bit S-box equivalent boolean logic operations sequence's length is ~20 ops...
Upd: Found it: 16 truth tables derived from S-box table, swap memory method (SMM), then Quine McCluskey algorythm.
izard: (Default)
2010-09-06 08:23 pm
Entry tags:

Hate post: zollamt.

Just got few books from amazon.com (those were not available from amazon.de) I agree I need to pay customs duty, but why the hell I should go to some remote place which works only during working hours on workdays! There is an option to delegate this to post but they claim it will take additional 3 weeks - more then it took it to get from US to Munich.

And meanwhile they will charge 50 cents per day, starting from the day they received the parcel from Amazon, not the day they informed me.

Upd: duty was about 6%, special rate for "fachbuecher"