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I get it to work now and then but I never get really sure why it works etc. Anyone got a suggestion for what to write in interfaces to start with? 12:28 === daejavu [[email protected]] has joined #ubuntu.
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Asm- 26-Jul-05 2:17 -asm- 26-Jul-05 2:17 Your code is good, but it has one big mistake: software key is stored on customer's HDD. Good cracker finds it even if it is encrypted, obfuscated, covered with complicated functions etc. But there is one method which is unbreakable: software key received from vendor is used ONLY to decryption important data files.
So there isn't any place in protected program, where is software key comparison. It is necessary to use good encryption algorithm (blowfish, twofish etc. M i s t e r L i s t e r 20-Jan-05 4:57 20-Jan-05 4:57 All, After reading all of the responses posted here. I think 'Jon Person' has the best method for keeping honest people honest. One thing that hasn't been mentioned is biometrics.
Everybody has a unique finger print, retinal scan, etc. As biometric input devices become common place I am (almost) positive that these devices will be used to deter software piracy. Along with Jon Person's comments about internet verification, I think that this would put a big damper on piracy.
Burek123 7-Jan-05 7:56 7-Jan-05 7:56 Hi When I was reading this article I said, cool that's exactly what I need to know, since I need some sort of protection for my little software. Until I got to the point where it shows that no matter what sophisticated algorithm you use to code/decode protectionkey, hackers actually look for this IF (A = B) code. Well, maybe this could give hackers a bit more time to play: You don't use this IF (A = B) code but you can calculate some result from the keys, to get one number. For example if it's valid you get out 1 if it's not you get anything else but 1.
And you can use this result in your code. For example (I'm a delphi novice) you can use array. If you have an array of data as: name:array1.1 of integers and if you use this array in you main procedure in a way that runs with nameresult and it will be ok as long as result is 1, if result is anything but 1 it will fale. Then you need to trap the error and close the program on error. You can use dynamic array.
Or you can use different things, like converting string result to integer, assuming valid result should only return numbers. This is a simple example, but if you go around and implement similar kind of logic in lots of places in your program it could give hackers a bit of headache. I'm planning to implement sopmething like this, so if anybody has any comments on this, please do. Fafasoft 31-Dec-04 23:41 31-Dec-04 23:41 Well I have implemented a scheme roughly as it is described in the article. I have found mac addresses to be unreliable but harddisk serials appear to be more stable. As far as internet licensing is concerned it requires more work on the server side and can also be circumvented by simple cutting out the protection code, same goes for dongles. I have witnessed a dongle broken with an oscilloscope in less than one week by a team of engineers!
I'm convinced our code will be broken someday as there is only so much time you can spend on this but I did follow some recommendations from fravia himself. The problem as also stated in another article is how much time can you afford to spend on protection coding anyway? Jon Person 30-Dec-04 22:37 30-Dec-04 22:37 I guess I don't see where all the fuss about copy protection is coming from? As a component developer, I have experience with the battle between fighting piracy and keeping things simple for my customers. Using an over-the-web activation system such as a.NET Web Service works very well because it gives you control. Specifically, it gives you the ability to.do something. when a license is abused, and stop the.growth.
of piracy. I've found that if I can shut down a license, things get a whole lot more relaxed around the office.
Licenses are bound to a developer's machine. If their hardware changes and the key is invalidated, no problem. They just go online, and as long as they have the username & password, they can log in and re-issue themselves a new key.
Re-issuing a new key shuts off the old one. Who.really. re-installs their development box every Tuesday?
In my experience, months will go by between radical changes in hardware. All registration attempts are recorded in SQL server. If the level of registration activity gets suspiciosly high, the account shuts itself down and I get an e-mail. I give the customer a quick call, get their side of the story and usually switch 'em back on.
It's absolutely true that any copy protection scheme can be broken, but that's missing the bigger picture. The bigger picture here is controlling the spread of piracy. If a pirate steals some poor lady's credit card, uses it on me and posts a serial number up on Crackspider, I set a bit from 1 to 0 in SQL server. License keys quietly re-validate themselves every once in a while, and the pirate finds out one sunny day that the effort he put into spreading the serial number has been wasted.
Hopefully, he spends an hour trying to figure out why things suddenly stopped working, which does ALL of us a favor. Give internet validation some serious consideration. If you do it right, you can do it without bothering your developers, and the internet call is quite speedy.
Sure, it takes work to implement the whole system, but don't be scared to sink your teeth into it. For every rare developer that whines that you can't magically detect when he's at a computer, you'll have gained hundreds in hard-earned revenue. Copy protection is here to stay, piracy is here to stay, and you CAN make systems which successfully balance control over piracy with convenience to your customers. Manuele Sicuteri wrote: But if these intentions was not clear to you probably they are not well expressed in the article. By the way, I believe your comment are useful in understanding the issue in more detail.
Hello Manuele! Quite possibly I have judged this article too hard. Protections are jest an old passion of mine and your article was advertised by CodeProject newsletter as a November prized text.
And every time I read something on CP I do not understand half of the article and think 'These guys are geniuses! How can it be I am such a lamer?'
This time I did not only understood whole artictle, I could also read much more. And this is my first time when I wrote something on CP, so it is possible that I took it too seriously. Keep up good work on your next articles, Krzysztof Wojdon. OK I agree with Krzysztof Wojdon OK I agree with Krzysztof Wojdon But if you wish you can use the licensing scheme but that is all. O you could do a database thing and get the processor ID and other information that is not personal but can identifies the computer with which it is on. However is it worth it to you? Does meets your customers needs?
It is a very good product then Copy-write it and register the product with an Icon and business name. Sorry numbered companies have little strength. Then be prepared to find illegal copies and sue the one who sold it and remove from people who are using with out proper licenses.
This industry is a tough one and some little code write here and there is not worth much. If you can create it so can some one else. Morally it is not good if code is destructive because the licensing part of the code is tampered.
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The industrial sector are not nice when code does this and will come after the one who wrote it should the program do something it should not. If they are doing it illegally you will know for the customer will show to other the process and controls he is using under ISO9000 specs how he makes his product. (Using your product) Destructive code in Canada is an illegal. Consider a virus etc by all means of the courts.
So buy a key or any other key code system. But place many registered ICON and symbols with in the product and make it know that is what the product does check for and live with it. Should you know of a Cracker who is cracking report him / her to the authorities ASAP. White-collar crime is just that that. If you know of but do nothing, then you are adding and abetting the ACT. There is no protection really, for if you can create it so can anybody else in software.
Food for thought. Now if it takes you a year with a team of 5 or 6 people and get it out the door and make good. Crackers will try but it may take them time to break into your market and they will be found out. DOS was cracked in little time but IBM protected the software, which is what bill Gates wanted then when the license agreement expired for IBM, Bill Gates was protected under copy write laws.
NO need for protection. But Bill gates was losing still 50% on DOS when windows 3.1 and 75% when Windows 95. By the time of Windows XP DOS is no longer supported nor does it work well with the XP platform, at this time sales of DOS 6.0 was less then 1% legal. So how-many legal sales of windows 98 / 95 / 3.1/ DOS are there in the world none MS does not support or sell it anymore. Rule 1 produce a good the product and always improve it. The OS changes what every 3 to 5 years now, hard for crackers to keep up at that pace.
I am agree with all the things you said in this message, but there is one point I can not be agree it is what you called CONTROLLED ERRORS. Apart all the 'morality' or 'ethic' stuff, there is another important point, if you add bugs to your code it will goes bad, and if the cracker things that his 'crack' works, your program will be executed with that controlled errors and the users will see that your aplication or program does not run well, so it is better not to execute that program because it doesn't run as expected. Conclusion, you are a bad programmer. Regards, Josep Oncins i Casanova. Pocjoc wrote: I am agree with all the things you said in this message, but there is one point I can not be agree it is what you called CONTROLLED ERRORS.
Could you be more specific about 'not agreeing'? If you do not agree, you support intentional bugs as a part of protection scheme. If you think it is a bad idea, we share the same point.
However, I make small excuse for all those not-so-serious applications. Drawing red triangles during level 4 of 3D shooter is different from accepting concrete construction that is going to break apart in winter. If the cracker things that his 'crack' works, your program will be executed with that controlled errors and the users will see that your aplication or program does not run well, so it is better not to execute that program because it doesn't run as expected. Conclusion, you are a bad programmer. I'd rather say that cracker was a bad cracker. And if someone is not smart enough to find out that cracked program may work not as expected. Quite probably is not also bright enough to judge programming abilities.
Well, anyone has right to have an opinion, but it is like a thief complaining in the court that the stolen thing is not good enough. On the other hand programmers must be cautious with protections. Each time protection hits user, it hits your reputation and in a longer period - income. Best regards, Krzysztof Last Visit: 19-Dec-18 22:28 Last Update: 19-Dec-18 22:28 1 General News Suggestion Question Bug Answer Joke Praise Rant Admin Use Ctrl+Left/Right to switch messages, Ctrl+Up/Down to switch threads, Ctrl+Shift+Left/Right to switch pages.