cross-platform compress & decompress
gizmotron at earthlink.net
Wed Dec 3 20:06:24 EST 2003
On Wednesday, December 3, 2003, at 02:58 PM, Wouter wrote:
> You're really on to the fast track :^)
> Hope to see your results soon.
What you are looking at is the old ECB (electronic code book) version.
I added my own version of CBC (Cypher Block Chaining) to make it even
more difficult to decrypt. I have it broken down into three parts now.
The S1, S2, S3, S4, & Sp boxes are created and stored in globals so
that encrypt & decrypt can run faster without having to re-initialize
the boxes before using them. These boxes could be called from
internally saved property arrays for use with a pre-fixed encryption
key. This allows for different initialization vectors for CBC for each
call. Isn't that fun?
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