Hi
I would like to ask howcome no one is writing any documents about cryptography based schemes. That be it RSA, Blowfish, Elgammal - howto identify what encryption is used, and howto aproach them and in the end maybe write a keygen? - But it seems most people just keep their knowledge to themselves about that topic - so if someone could please write any documents about this very interesting subject i think many people would be thankfull :-)

- Crypthography in general would be interesting reading, more and more schemes use crypthography in someways.

Hi,

You know, you dont *need* to rely on anyone else to write tutorials for it. Why not set out to read up on crypto and progress on your own.

On the REKML files download area (rekml.cjb.net), is a great crypto book by Bruce Schneir (Sorry Bruce, I can never spell your surname correctly

Also of interest:

The RSA FAQ (zipped PDF)
ftp://ftp.rsasecurity.com/pub/labsfaq/rsalabs_faq41.zip

FTP site of Crypto tools, papers and code
ftp://ftp.compapp.dcu.ie/pub/crypto/

Some crypto algorithms; many broken links
http://www.cs.auckland.ac.nz/~pgut001/cryptlib/algorithm.html

Hope this gets you started.

Regards

Carpathia

It is not easy (if not too difficult) to pinpoint the crypto algo used to produce a given ciphertext.

However, sometimes it is possible to findout the algo very quickly from the proggy.

Different crypto and hash algos use different numeric constants. Thse search for those numeric constants (and possibly their arithmetic relations) will yield some results.

See carp's links.

Search for the "mcrypt" and "mhash" libraries. They include the necessary information.

Kind regards.

Epic

Thanks for your kind replies. But i predicted the reply with bruce's book. And sure its good, but i would like if someone could write a tuturial about cryptography in protection schemes, as a start offset. Because so far i have seen no one share their knowledge on this subject.

- JJ