Cryptography-Digest Digest #409, Volume #13 Tue, 2 Jan 01 02:13:01 EST
Contents:
Re: Cryptanalysis Recomendations (John Savard)
Re: Cryptanalysis Recomendations ("John A. Malley")
Test Data for DES? ("Dave Rudolf")
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From: [EMAIL PROTECTED] (John Savard)
Subject: Re: Cryptanalysis Recomendations
Date: Tue, 02 Jan 2001 04:12:34 GMT
On Tue, 02 Jan 2001 01:00:44 GMT, [EMAIL PROTECTED] wrote, in
part:
>P.S. I have already purchased "Elementary
>Cryptanalysis" by Sinkov and would not recommend
>it to anyone ( unless you want 200 pages of how
>to crack mono and poly-alphabetic cyphers).
It has its uses, but yes, what you're looking for isn't one of them.
Cryptanalysis - originally titled "Elementary Cryptanalysis" - by
Helen Fouche Gaines, from Dover, is *the* introduction to solving
pencil-and-paper ciphers.
There's some free stuff on the web covering similar territory; the
Lanaki course (Classical Cryptography Source, on J. Peschel's home
page), and a U.S. Army manual in the "Crypto Drop Box". There are
links to these on my site on the 'Links' page.
For something more advanced, but not too mathematically oriented,
there is "Decrypted Secrets" from Springer-Verlag, but that is fairly
advanced.
John Savard
http://home.ecn.ab.ca/~jsavard/crypto.htm
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From: "John A. Malley" <[EMAIL PROTECTED]>
Subject: Re: Cryptanalysis Recomendations
Date: Mon, 01 Jan 2001 20:42:03 -0800
[EMAIL PROTECTED] wrote:
>
> Hello all,
>
> Can anyone recommend any good books for learning
> crypanalysis? I have only a little maths
> background so one that starts from a fairly easy
> level would be good.
>
> Chris.
>
> P.S. I have already purchased "Elementary
> Cryptanalysis" by Sinkov and would not recommend
> it to anyone ( unless you want 200 pages of how
> to crack mono and poly-alphabetic cyphers).
>
I'm sorry to hear that. What soured Mr. Sinkov's book for you?
"Elementary Cryptanalysis" is in the same vein as the cryptanalysis
books of William F. Friedmann, and the updated volumes of William F.
Friedmann and Lambros D. Callimahos. These books
"Military Cryptanalysis Parts I, II, III and IV"
and
"Military Cryptanalytics, Part I Vol 1, Part I Vol 2, Part II Vol 1,
Part II Vol 2"
give step-by-step training in methods of cryptanalysis of many kinds of
ciphers (starting from simple substitution ciphers and building up to
transposition and fractionating systems) and provide sample ciphers to
crack with those methods. You can find them at Aegean Park Press -
http://www.aegeanparkpress.com/books_by_title.html
You'll also find titles covering specific ciphers and their
cryptanalysis - such as
"General Solution For The Double Transposition Cipher", Solomon
Kullback, Ph. D.
"Cryptanalysis Of The Single Rotor Cipher Machine", Donald A. Dawson
"Cryptanalysis Of Shift-register Generated Stream Cipher Systems", Wayne
G. Barker
Another good general book covering cipher systems and cryptanalysis is
"Decrypted Secrets, Methods and Maxims of Cryptology" by F.L. Bauer,
ISBN 3-540-60418-9.
Also take a look at
"Making, Breaking Codes, an introduction to Cryptology" by Paul Garrett,
ISBN 0-13-030369-0.
Prof. Garrett does a good job explaining the evolution of cipher systems
from simple substitution and transposition systems to the public-key
asymmetric cipher systems of the late 20th Century. (Finally I can write
something like that in a post - feels so good, we being in the 21st
century and all :-) ) His book covers the math behind the ciphers. He
covers cryptanalysis of those systems as well. He briefs the reader on
the latest cryptanalysis results for attacks on public-key systems and
provides references to the papers explaining the attacks in detail. Most
of the papers referenced in his book are on-line at places like
http://www.counterpane.com/biblio/
Hope this helps,
John A. Malley
[EMAIL PROTECTED]
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From: "Dave Rudolf" <[EMAIL PROTECTED]>
Subject: Test Data for DES?
Date: Tue, 02 Jan 2001 06:33:09 GMT
Howdy,
I'm doing a software implementation of DES for a school project. Alas, it has a
bug. The first round works fine, but it all sems to crap out after that. It
would be helpful to have some sample output after each round to compare with my
work. Can anyone point me in the right direction?
Also, rather unrelated, it seems as though the Initial Permutation in DES, and
it's inverse, do not actually add any security to the system, as they are both
unary functions. Is this so, or am I missing something?
Thanks,
Dave.
=======================================================
http://members.home.net/dave.t.rudolf
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