Encryption

Hi guyz,

I need a Encryption/De-cryption code that is fast, very very secure on Large Files of any format. I need this urgently.


Also need a compression code.

I would be grateful if the codes are well commented.

PM eiSecure he is good at these things :)

Hallo,
I have an example code fpor encrypting/decrypting files with
9 different algorithms :

"Simple XOR", "http://tuath.pair.com/docs/xorencrypt.html"
"Blowfish", "http://www.counterpane.com/blowfish.html"
"CryptAPI"
"DES (Data Encryption Standard)", "http://csrc.nist.gov/fips/fips46-3.pdf"
"Gost", "http://www.jetico.sci.fi/index.htm#/gost.htm")
"RC4", "http://www.rsasecurity.com/rsalabs/faq/3-6-3.html")
"Skipjack", "http://csrc.nist.gov/encryption/skipjack-kea.htm")
"TEA, A Tiny Encryption Algorithm", "http://www.cl.cam.ac.uk/Research/Papers/djw-rmn/djw-rmn-tea.html")
"Twofish", "http://www.counterpane.com/twofish.html")

If you want this code, I will mail it to you.

Bye,

André

Hi arausch,

Yes, if u can puhleeze send me the code.

Hallo,
I can't send you anything, until you post your e-mail-address,
I get this nice message :

Sorry! That user has specified that they do not wish to receive emails through this board. If you still wish to send an email to this user, please contact the administrator and they may be able to help.

Bye,

André

heheheh pretty dodgy

You are ten years older than me hamins :eek:

Quote:

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Originally posted by da_silvy
heheheh pretty dodgy

You are ten years older than me hamins :eek:

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?

Just saying that it's stupid that it says click heere to email this user,

then i brang up the point that hamins is 10 years older than me...

irrelevant but just thought i'd mention it :rolleyes:

You should post code here because it might interest someone other :)

I won't post 5.000 lines VB-Code(9 class modules, 3 forms, 2
modules).

Hi arausch,

I too think that you should post the code here itself. Either in the message box or as an attachemnt. That way besides me some other soul could also use it.

Thanx

Quote:

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Originally posted by arausch
I won't post 5.000 lines VB-Code(9 class modules, 3 forms, 2
modules).

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If u want to share u could zip it up and post it ... not a problem :)

I'd also like to have a peek at this :)

I'm new to this forum, I didn't see the "Attachment Box".

thanks arausch :)

thanks man ;)

I have seen u'r code what u have attached and it is working fine...Does it support quoted printable formats...

Thanx a ton arausch. !!

I have'nt checked the code as yet, but thanx anyways.

Thx for the code I will check it in few !

I got some code that encrypts and decrypts strings. It encrypts any size string and it's FAST!!! See speed test below.

Test 1 :
Line Length : 50000 characters
Str Gen :
Encrypt Time : 0.2188 secs.
Decrypt Time : 0.2812 secs.
Total Time : 0.5 secs.
Result : Good

Encryption logic does not use XOR because it's too slow. The code is a little long because using large strings is SLOW and had to work around that. Please use it and try and make it even faster!

The function allows the user to supply a key but does not require it. It you want it, email me at [email protected] and I'll mail it to ya.

=\=

Rikk, also consider why people encrypt their stuff.

It's for security reasons, not speed. Although XOR is slow, there are more secure alternatives, such as 3DES, IDEA, or RC4/RC5.

Quote:

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Originally posted by arausch
Hallo,
I have an example code fpor encrypting/decrypting files with
9 different algorithms :

"Simple XOR", "http://tuath.pair.com/docs/xorencrypt.html"
"Blowfish", "http://www.counterpane.com/blowfish.html"
"CryptAPI"
"DES (Data Encryption Standard)", "http://csrc.nist.gov/fips/fips46-3.pdf"
"Gost", "http://www.jetico.sci.fi/index.htm#/gost.htm")
"RC4", "http://www.rsasecurity.com/rsalabs/faq/3-6-3.html")
"Skipjack", "http://csrc.nist.gov/encryption/skipjack-kea.htm")
"TEA, A Tiny Encryption Algorithm", "http://www.cl.cam.ac.uk/Research/Papers/djw-rmn/djw-rmn-tea.html")
"Twofish", "http://www.counterpane.com/twofish.html")

If you want this code, I will mail it to you.

Bye,

André

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Just 1 comment: CryptoAPI is designed for C/C++. For us VB programmers, there's CAPICOM, which is basically a DLL containing everything CryptoAPI has, but in easy-to-use simple function calls.

Either search these forums, post a message at my forums, or search Microsoft's MSDN Library for more info.:)