Ancient Cryptography

General => Just About Anything => Topic started by: Dutch on July 10, 2007, 03:28:42 PM

Title: Cryptography Programming
Post by: Dutch on July 10, 2007, 03:28:42 PM

I have a program which enciphers a plaintext message using a K2 key using simple substitution.  It is available to anyone who would like to have a copy of their own.  Just e-mail me at:  archieb42164@yahoo.com and I will send it as an attachment.  If anyone is interested in programming enciphering or deciphering  applications,  we can start a group in which we exchange code and techniques.

Dutch

Title: Re: Cryptography Programming
Post by: Aaron on July 14, 2007, 02:43:51 PM

I once programmed quite a few of the simpler ciphers in Linux, though I'm sure that encrypter/decrypter programs with expansive functionality already exist. Still, it would be nice to make something which has many possible choices for encrpytion and decryption and maybe throw in a few new ones or uncommon methods. That way one could quickly take a block of text and try multiple methods of cracking the cipher with ease.

Title: Re: Cryptography Programming
Post by: Stun90 on July 20, 2007, 10:28:43 AM

Dutch, that sounds great. We need more encyphering and decyphering.   Also exchanging techniqueswas one of the reasoons that I joined here. Please send it to me.

Title: Re: Cryptography Programming
Post by: lyratzis on September 11, 2007, 09:10:08 PM

forgive my ignorance, but what is a K2 key?

Title: Re: Cryptography Programming
Post by: Aaron on September 11, 2007, 10:49:07 PM

That's a good question... I don't rightly know. Google doesn't seem to be helping. Hopefully Dutch can clarify.

Title: Re: Cryptography Programming
Post by: Dutch on September 12, 2007, 10:49:42 AM

A K2 keyword is where the plain alphabet is the normal alphabet in standard sequence and the cipher alphabet has the keyword.

P:  ABCDEFGHIJKLMNOPQRSTUVWXYZ
c:   BCDFGHJKLMOQRTUWYZEXPNSIVA

I hope that this answer and example will help.  Sorry for any confusion.

Dutch

Title: Re: Cryptography Programming
Post by: Aaron on September 13, 2007, 10:28:41 AM

Ah, I see. So it's just substitution with a known keyword somewhere in the cipher key.

Title: Re: Cryptography Programming
Post by: 7thdayjim on January 07, 2008, 03:00:55 AM

Dutch, sounds good, please send me your program. Thanks

Title: Re: Cryptography Programming
Post by: MadMax on June 18, 2008, 05:03:31 PM

I wrote an RSA encryption program in Python.  K_e and K_d (the public and private keys) are created from primes of at least 100 digits.

The encryption interface is pretty easy to use.  There is a box to put in plaintext and a button to encrypt it, which is dependent on who you are sending the encryption to (theoretically, everyone has a unique public/private key set).  The encrypted numerical string is output into another box.  This is what you send the intended recipient.

The decryption interface works the same way, only inverse to the encryption interface. 

If anyone is interested in having this program to use for yourself, email me at: hanieldardin@writing.com.