[113] in cryptography@c2.net mail archive
Re: CAST
daemon@ATHENA.MIT.EDU (Jeremiah A Blatz)
Fri Jan 31 14:48:43 1997
Date: Fri, 31 Jan 1997 14:34:22 -0500 (EST)
From: Jeremiah A Blatz <jer+@andrew.cmu.edu>
To: coderpunks@toad.com
CC: coderpunks@toad.com, cryptography@c2.net
In-Reply-To: <Pine.A32.3.93.970131105505.38842A-100000@gpu5.srv.ualberta.ca>
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"C. Kuethe" <ckuethe@gpu.srv.ualberta.ca> writes:
> On Fri, 31 Jan 1997, Ng Pheng Siong wrote:
>
> > Hi,
> >
> > Attended a presentation by Milkyway, vendor of the BlackHole firewall, which\
> also does VPN.
> > Supposedly the symmetric cipher used in the VPN is called CAST. Anyone has a\
> ny info on it?
> > TIA. Cheers.
>
> It's a canadian cipher. It's inventors have the initials C.A. and S.T. pure
> coincidence they say. it's got a little write-up in Appl. Crypto 2, and I'll
> post anything I can about it as soon as I get home. I don't have my copy of
> ac2 on me... I do remember that it's patented, and you have to talk to these
> folks for licences I believe.... more to come later.
Well, sine I've got _AC_ right here...
CAST uses a 64 bit key, 64 bit block size, 6 S-boxes with 8 bits in,
32 out, 8 rounds. S-boxes are implementation-dependant, and supposedly
kinda complicated to make.
CAST is resistant to linear and differential cryptanalysis, ans there
is suppoedly no known way to crack it faster than brute-force.
CAST is patent-pending.
Jer
"standing on top of the world/ never knew how you never could/ never knew
why you never could live/ innocent life that everyone did" -Wormhole
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