[转载]Protect your programs from piracy
信息来源：lastbit.comPlease note: this article was written in 1997, it does not cover latest developments!
INTRODUCTION
At one Web site I’ve seen a curious discourse, whether your programs should be furnished with anti-pirate devices. It went like this: No one has a right to enter your house without your consent. The inviolability of your house is protected by law. Nevertheless, you prefer to have a lock in your front door. Further proceeding with this comparison, we’d have to admit that after putting a lock on the door many software authors leave their keys at the front door or they lock a wrong door at all.
Here are some initial remarks.
This article is intended for those software developers who do not professionally engage in issues of protection from any unauthorized usage. It’s aimed at pointing out the most typical mistakes and helping to create more impregnable software.
Discussed here are the issues of creation of shareware and trial versions for Windows’95 (and Windows NT, if stated so). Leaving specific examples aside we can say that everything that is mentioned below is true for other platforms, too.
This article does not claim to cover the problem in its entirety.
You can contact the author at [email]vitas@webdon.com[/email]. Even if you don’t have any specific suggestions or notices just send in your opinions about this article. This article may be continued in future, so please give us your opinion about this, too.
There exists an opinion that hackers are unique specialists and they can be fought only by specialists like them, yet an ordinary software developer is unable to do it and he shouldn’t even try to. Therefore you shouldn’t try to protect a program from a break-in, because it wouldn’t save from a hacker and you should only create a simple fool-proof protection. Meanwhile, as unexpected as it may sound, a typical hacker is not in any way an able specialist; he cracks programs because he is unable to do anything else (a proverb
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