baseConvert() & 32-bit ops

[Mark Brownell]

On Monday, June 23, 2003, at 11:45  AM, Dar Scott wrote:

>
> On Monday, June 23, 2003, at 12:19 PM, Mark Brownell wrote:
>
>> the -1 is in regards to the bitAnd part of the f function's S-boxes.
>>
>>>>     f = S1[a] + S2[b]
>>>>     f = bitXor( f , S3[c] )
>>>>     f = bitAnd( f + S4[d], -1 )
>
> Yeah, replace that last bitAnd with a mod 2^32.
>
>> I'm tempted to get that highly recommended book that you referenced.
>
> You will see that my final one line for above turns out to read just 
> like the line in the book.
>
> If you have a reference you prefer, I'm willing to let you buy me a 
> copy of that!  But if you don't do that and you can afford it, get 
> Schneier.  It will help in clarifying your thoughts and in 
> communicating with people like me.  It covers Blowfish, block ciphers 
> in general, and Freistel networks in general.  It even has C code for 
> Blowfish.
>
> Dar Scott

Hi Dar,

I wish I was on this list long enough to know how you might take a joke.

> If you have a reference you prefer, I'm willing to let you buy me a 
> copy of that!

My normal response would be that I would be tempted to get you a book 
on how to dress for major geeks. :-) Only your friends would know for 
sure. Anyway...

You have been so helpful that I'm going to give you a free publisher's 
addition of MTML 3.0 e-Book and Article reader when I get it done. It 
supports the free to distribute MTML 3.0 Study tool e-Book and Article 
reader. I hope that you will use it to publish a book on using Rev. If 
you are to busy to learn a new markup-language then I would be happy to 
configure any book you wish to write for publishing in this format.

I'm so jazzed about the speed modifications  that I might be able to 
skip using Valentina as a back end for publishing in the study tool 
format. A faster encryption process was a user issue. I already have a 
string based database engine (think XML database with a pull parser for 
selective query) for MTML that is fast enough even for books that are 
larger than 2 megabytes.  (a 300 page 6 x 9 paperback tends to run 
around a little less than 400 kbts.)

Thanks for your help,

Mark