Re: Encryption Export Legality

From: Luc The Perverse (sll_noSpamlicious_z_XXX_m_at_cc.usu.edu)
Date: 07/29/05 

Date: Fri, 29 Jul 2005 00:31:12 -0600

"Unruh" <unruh-spam@physics.ubc.ca> wrote in message
news:dcc2l6$k2n$1@nntp.itservices.ubc.ca...
> "Luc The Perverse" <sll_noSpamlicious_z_XXX_m@cc.usu.edu> writes:
>
>>"Unruh" <unruh-spam@physics.ubc.ca> wrote in message
>>news:dcaapc$17p$1@nntp.itservices.ubc.ca...
>>> "Luc The Perverse" <sll_noSpamlicious_z_XXX_m@cc.usu.edu> writes:
>>>
>>>>I will take the Gnu GP algorithm and replace RSA with blowfish.
>>>>(Blowfish toutes itself as a drop in replacement for RSA anyway.)
>>>
>>>>Now that I have spoken my idea, I will no doubt get flamed.
>>>
>>> Yes, because it is just wrong. Blowfish is a symmetric secret key
>>> algoritm,
>>> RSA is apublic key algorithm. Like saying you are going to take
>>> the
>>> engine
>>> out of your care and put in a tire.
>>> Blowfish never has and never will tout itself as a replacement
>>> for
>>> RSA.
>
>
>>Dammit. This is what happens when I read something a long time
>>ago
>>and then don't read it for a really long time.
>
>>>From http://www.schneier.com/blowfish.html, "Blowfish is a
>>symmetric
>>block cipher that can be used as a drop-in replacement for DES or
>>IDEA"
>
>>This is exactly what I mean though. I think that if I started
>>taking apart PGP, working with the code, I would have at least
>>known
>>what you have told me. It's not going to make me a cryptographer,
>>but then again, that wasn't the intention.
>
> GPG already contains blowfish as a possible symmetric algorithm.
> gpg --version
> ...
> Supported algorithms:
> Pubkey: RSA, RSA-E, RSA-S, ELG-E, DSA, ELG
> Cipher: 3DES, CAST5, BLOWFISH, AES, AES192, AES256, TWOFISH
> Hash: MD5, SHA1, RIPEMD160, SHA256
> Compression: Uncompressed, ZIP, ZLIB, BZIP2
>
> Yes, taking apart the code in gpgcould teach you a lot. So could
> trying to
> break simply crypto algorithms. But do not try to publish your
> efforts
> until you really have learned.

Ok . . . So what is a very simple crypto algorithm that I could work
on cracking? (Obviously something that is not commonly used now.) 

-- 
"When you have to choose between a first-rate company with a 
second-rate product and a second-rate company with a first-rate 
product, it's never an ideal choice. " -Ed (www.overclockers.com)

Relevant Pages

  • Re: Question
    ... > XOR. ... >> Where can I find a database with the public algorithms listed, ... -- "When you have to choose between a first-rate company with a second-rate product and a second-rate company with a first-rate product, ...
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  • Encryption Export Legality
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  • Re: [CRYPTO]: Miscompiling sha256.c by gcc 3.2.3 and arch pentium3,4
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