......VB Encryption Libraries ? 1

[rpk2006]

Hi,

I want to use any Visual Basic Encryption Library with my
program to Encrypt/Decrypt files.

I have heard that DLL files for various Encryption Algorithms
like BLOWFISH, RIJNDAEL, DES, CAST etc..
are available FREE for personal use.

Suppose I use any DLL file with my program to Encrypt/Decrypt
file(s), then is it possible for any hacker that he can steal
the DLL file and my file which contains Encrypted data, and
Decompile the DLL file to decode the Encrypted file data?

Please suggest some good places from where I can get the
libraries (VB version) and help about how to call them from
within my program.

Thanks.
There is always a new solution for the same problem.

Anonymous

 

[aklein]

Blowfish and DES, among others, use a dual key system, so knowing the algorithm without knowing the key wouldn't allow you to decrypt (strong encryption algorithms are public knowledge, but they still can't be easily broken). Having a massive supercomputer would make decrypting without the key easier, but it still wouldn't be cost effective, unless what was encrypted was the secret of invisibility.

Where you'd get the DLLs I can't help you with.

 

[strongm]

Windows has a built-in cryptography API...

 

[Alt255]

A few of these offer a pre-compile DLL for download. Some of them provide source code. All of them contain information you can assimilate to help you clarify the direction of your rather interesting project.

http://www.crypteon.co.uk/des-source-code-toolkit

http://www.crypto-central.com/

http://www.counterpane.com/blowfish-download.html

http://www.di-mgt.com.au/crypto.html

http://www.phpbuilder.com/mail/php-developer-list/199903/0328.php

http://sourceforge.net/projects/blowfishvhdl

http://web.mit.edu/thouis/www/ecrypto.html

http://www.totse.com/en/privacy/encryption/techdes.html

http://bsn.ch/Lasse/bfacs.htm

http://www.geocrawler.com/archives/3/5/1999/3/0/1440664/

http://www.eskimo.com/~weidai/cryptlib.html

http://www.turbopower.com/products/LockBox/

http://codetools.com/cpp/blowfish.asp

http://www.cityinthesky.co.uk/cryptography.html

http://www.brisse.dk/linux/phpext/blowfish.htm

http://www.di-mgt.com.au/cryptoBlowfishASP.html

http://web.bsn.ch/lasse/bfacs.htm

http://www.openwall.com/crypt/

http://www.wiley.com/cda/product/0,,0471353817,00.html

http://www.counterpane.com/twofish.html

http://www.ddj.com/articles/1998/9812/9812b/9812b.htm

http://www.terravista.pt/ilhadomel/2014/tf.html

http://csrc.nist.gov/encryption/aes/round2/r2algs-code.html

http://www.twofish.org/

http://libtomcrypt.sunsite.dk/

http://hollerith.cs.transy.edu/campbell/cryptology/twofish/etc.html

http://saturn.hut.fi/~helger/crypto/link/block/twofish.html

http://www.angelfire.com/mo/isswgaryr/programs.html

http://www.diskencryption.org/

http://shop.barnesandnoble.com/booksearch/isbnInquiry.asp?sourceid=7354618&isbn=0471353817

http://www.macfergus.com/niels/pubs/twofishAES.html

http://csrc.nist.gov/encryption/aes/rijndael/

http://www.esat.kuleuven.ac.be/~rijmen/rijndael/

http://csrc.ncsl.nist.gov/encryption/aes/rijndael

http://www.streamsec.com/prod_strsec2.asp

http://www.cryptix.org/news/02102000.html

http://www.aegiscode.com/

http://freshmeat.net/releases/42313

http://www.eskimo.com/~weidai/cryptlib.html

http://www.esat.kuleuven.ac.be/~mleeman/hj82/2001/encryption.html

http://www.cryptosys.net/sha1.html

http://www.sewelld.com/SecureHashAlgorithm.asp

P.S. Tek-Tips members have been helping you with this in the various forums for several weeks now. When do we get a status report?

 

[rpk2006]

Thanks Alt255,

I knew that if you will answer then it will go this much long.
Thanks for the links. There is always a new solution for the same problem.

Anonymous