once again

J. Baker · Post by **J. Baker** » Mon Sep 13, 2004 3:01 pm

I've seen this topic talked about a few times but was wondering. Is using PureUPX and PureValid together decent? I know nothing is 100% but it would be nice to block some of those crackers (lol, as if there all from georgia... nevermind).

Also, Pauls RC4 lib, how do you go about crypting strings? I mean, do you encrypt then while compiling then during runtime decrypt them?

Another thing, why not just get the serial of a harddrive and then have the customer send this number to you in a email then you send them a registration key back that when these two numbers equal a certain figure, well you get the gist. I'm sure some one here already uses this method.

Also read changing your registration key and/or download link once a week, which isn't bad but if you're not selling buttloads, why not just email them out with a unique key each time. Does any one do this?

Well, guess that's all I'm curious about and if anyone has any tips, I'll gladly keep it in mind.

Post by **Fred** » Mon Sep 13, 2004 4:38 pm

RC4, as AES and other crypt command just store in a secure way a data. That's means than you can decrypt it only with the right password. If you could decode it easily, it would be no interest. On the other side, Base64, UUEncode, etc.. are encoder/decoder which doesn't need a password and can be reversed at willing.

J. Baker · Post by **J. Baker** » Mon Sep 13, 2004 9:06 pm

Thanks for the information Fred, that clears up on how to use RC4.

J. Baker · Post by **J. Baker** » Mon Sep 13, 2004 10:17 pm

Has any one used Yodas Protector? Is this any good? Thanks

http://yodap.cjb.net/

Num3 · Post by **Num3** » Mon Sep 13, 2004 10:38 pm

J. Baker wrote:Has any one used Yodas Protector? Is this any good? Thanks

http://yodap.cjb.net/

Just crashes here...
Like many other protectors...
Only UPX seems to stable.

J. Baker · Post by **J. Baker** » Mon Sep 13, 2004 11:10 pm

Num3 wrote:
J. Baker wrote:Has any one used Yodas Protector? Is this any good? Thanks

http://yodap.cjb.net/
Just crashes here...
Like many other protectors...
Only UPX seems to stable.

I didn't get to much luck with it either, thanks Num3.

thefool · Post by **thefool** » Tue Sep 14, 2004 3:17 pm

my bet is that TELock is the best free encryptor around. free for commercial use too. http://www.softpedia.com/public/cat/5/2/5-2-6.shtml

J. Baker · Post by **J. Baker** » Tue Sep 14, 2004 4:11 pm

thefool wrote:my bet is that TELock is the best free encryptor around. free for commercial use too. http://www.softpedia.com/public/cat/5/2/5-2-6.shtml

The information about it sounds nice. I'll give it a try, thanks.

J. Baker · Post by **J. Baker** » Wed Sep 15, 2004 2:04 am

I was thinking of another way to create shareware registration keys and had an idea using Pauls RC4.

1.) Encrypt your software with RC4. Make it available for download after purchase.

2.) Then an email is sent to the buyer with a link to download an exe that decrypts the purchased software. After decrypting the software it deletes itself. (Also, making the "decrypting.exe" available as a one time download. After downloading it, it can't be downloaded anymore. I'm sure this would take a php script.)

If the buyer has a problem with the first download, just reset it for him/her. Also changing both exe's every week. What do you guys think about that?

benny · Post by **benny** » Wed Sep 15, 2004 8:10 am

@j.baker:

I always like new theories of new protection methods. Nevertheless,
I could imagine some disadvantages of your method:

(1) It could be too complicated for a potential buyer of your product.
If someone sends you money he may just want to take one more
download of the final version. Such a protection could deter ppl to
buy your product

(2) What would happen if someone copies the decrypted file and the
decrypter.exe before installing

J. Baker · Post by **J. Baker** » Wed Sep 15, 2004 8:19 am

Your points are valid, just always thinking here. Maybe if I would quit thinking so much I could get some sleep, lol.

J. Baker · Post by **J. Baker** » Wed Sep 15, 2004 3:21 pm

thefool wrote:my bet is that TELock is the best free encryptor around. free for commercial use too. http://www.softpedia.com/public/cat/5/2/5-2-6.shtml

I keep getting

Not enough free space in section table.

thefool · Post by **thefool** » Wed Sep 15, 2004 7:53 pm

read the help file, and turn some options on and off

J. Baker · Post by **J. Baker** » Wed Sep 15, 2004 10:13 pm

thefool wrote:read the help file, and turn some options on and off

I did that, nothing seems to work, thanks though.