Exetools  

Go Back   Exetools > General > General Discussion

Notices

Reply
 
Thread Tools Display Modes
  #1  
Old 10-29-2004, 03:13
aldente aldente is offline
VIP
 
Join Date: Jul 2003
Posts: 266
Rept. Given: 27
Rept. Rcvd 7 Times in 5 Posts
Thanks Given: 35
Thanks Rcvd at 10 Times in 9 Posts
aldente Reputation: 7
WebCops - THE uncrackable protection (?)

Hello!

LinkData offers a very hard to crack copy protection, e.g. used by Brockhaus Digital Enzyklopädie (see file below) or Hyperbowl (WinXP Plus Pack).

It is used by high-quality software, and yet uncracked
It uses a system similar to Microsofts activation since Windows XP: the software can be unlocked by phone or the internet.
It works in the following way (when unlocking via phone): you say your authorization code, machine id, program id, and get an unlock code. As the authorization code is not entered into the program, it can't be checked, whether you have a guilty one.
So JUST the unlock code has to be generated!

Unfortunately I am not a big cracking expert. To get it to work, I wrote a brute forcer. It would be interesting to know, how many numbers (only numbers!) the unlock code consists of. The brute-forcer does 64 keys/s, so the right code would probably be found within less than 18 days IF it consits of 8 numbers

Here is an example application protected by WebCops v1.51:
http://eldorado.s4.cybton.com/data/brockhaus.rar

Maybe here is an experienced cracker, who can proof, the this is NOT an unbeatable protection!
Reply With Quote
  #2  
Old 11-16-2004, 07:07
archaios
 
Posts: n/a
"Unbeatable" protection

Hi,

Software protection is inherently flawed. With creative use of a dongle (i.e. irretrievable *hardware* public-key encryption of critical sections of code), it is possible to create a protection second-to-none - but even that is vulnerable to several 'man-in-the-middle' and reverse-engineering attacks. It may be computationally infeasible to break a particular protection, but impossibility is not guaranteed unless a problem is not merely NP-hard but NP-complete, and in the latter case, brute force is still possible. Software protection attempts to *minimize* the impact of users defrauding the business; at this, it is most successful in many instances.

By the way: challenging someone to "crack this" seems more like a cheap attempt to have someone else work for you.

-archaios
Reply With Quote
Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is Off
HTML code is Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
rank your "uncrackable" software protection LaBBa General Discussion 100 10-22-2023 11:39
NEW Armadillo Version said UNCRACKABLE LOL azaza General Discussion 4 01-04-2004 17:27
CodeLock -- Still Uncrackable?? Spleen General Discussion 17 10-02-2003 22:22


All times are GMT +8. The time now is 17:20.


Always Your Best Friend: Aaron, JMI, ahmadmansoor, ZeNiX, chessgod101
( 1998 - 2024 )