is it allowed to make tutorials out of copyrighted material? I have been reading a lot of books about the IT world in general. I learned from those books. Now I wish to create some tutorials which will be available in public in form of a website. Suppose I intend to copy some sentences (from books or copyrighted material that does not allow copying neither a part), what if I copy them, but rephrase them in a different way? (the way I understood better for example, or add some more examples for that topic) Is that allowed, to rephrase a coprighted part of text so I can use it in public domain.
Ideas are not protected by copyright, only arrangements of words are protected. If you &quot;rephrase&quot; by only a minor change of wording, leaving much of the wording intact, that is still a copyright infringement unless an exception such as fair use or fair dealing applies (and that seems a bit doubtful in this case). If you &quot;rephrase&quot; so that the wording is quite different, even though the idea is the same, there is probably no infringement. Copying elements of computer code or other IT commands that are essential to making an example work is not infringement. Where there is only one or a very small number of ways to naturally express a fact, copying such expression is not infringement, as facts are not protected by copyright. Adding examples but keeping significant wording unchanged is still likely to be infringement.
Illegal to write? No. Notwithstanding the First Amendment which would almost certainly make a law prohibiting it illegal, writing such things is an essential part of an IT security professional’s toolkit. You can’t protect against worms if you don’t know how they work. Illegal to distribute on an unauthorised computer? Absolutely. This would be a clear breach of the Computer Fraud and Abuse Act.
Copyright is held by the person who puts the content out there in fixed form. If A reads a prepared text and B talks extemporaneously, A has copyright to his fixed text. Whoever then records the debate holds copyright to B's talk (not a typo). If that person is B, A can point out that A's copyright was infringed, presumably leading B to an equitable arrangement that would avoid copyright violation litigation. However, if the recorder is A, then B is hosed. On the other hand, if neither party has a prepared text, then the guy who does the recording has all the rights. And if both parties have prepared texts, nobody gets to record without a copyright agreement.
It would seem that your song is a derived work. You took the original work and found words that sound the same. If the original work had used different words, your work would have ended up differently. So you have a derived work. Same as making a translation; if the original was different, then the translation would be different, so the translation is a derived work. I was asked "How is this not straight up infringement". But it is. Not only copying is an exclusive right of the copyright holder, but also the creation of derivative works.
No It says right on the page you linked: These downloads are not public domain, as they are parts of content that has already been licensed and distributed. Although using these downloads may be permissible as long as the project itself falls under the rule of "Fair Use," it is ill-advised to use these downloads for any project intended for profitable gain or commercial advertisement, unless otherwise stated by Kyutwo.com.
Alice has been developing her own enhancements, and they're pretty similar to Bob's. Neither Alice nor Bob has copied the other's enhancements, so neither has violated the other's copyright in the enhancements. Whether that could be proved in court is another matter, of course, but since the original work is licensed under creative commons the question unlikely to arise in court. Would Alice be prevented from coming up with enhancements to her own game if other people could prove they thought of and released the idea first? No. Copyright does not protect ideas. It only protects a particular expression of those ideas from being copied. Theoretically, if two authors come up with identical 500-word descriptions of something and can establish that each did so independently, neither has a claim against the other. The practical problem there, of course, is that it would be impossible to prove such a thing. Could Alice outright claim Bob's "Adapted Material" because he developed it on her original work? Assuming that in publishing his adaptations Bob followed the terms of the creative commons license with respect to the original work, Alice's only claim would be that he copied her adaptations without following the terms of the license. If Bob can show that he did not do so, her claim would fail. In a comment, you wrote: Suppose Alice went ahead and intentionally, somehow provably ripped off Bob's "Adapted Material" because she liked the content so much, does Bob reserve any rights on his adaptation, or is Alice able to commercialize the work that Bob did in extending her original work? If we assume that Bob complied with the license of the original material, we know that he licensed his adaptations under "the identical terms," so Alice would be able to use Bob's adaptations under those terms for non-commercial purposes. Since the assumption here is that Alice provably copied something of Bob's, I think it is fairly clear that she would be liable for damages if she exploited that material commercially without paying royalties.
"Pastiche" is a literary, not a legal term, and as a professional coder, I would not use it to describe code that to some extent imitated other code. The legal question here is: is your code a derivative work of the code it is based on, and if it is, did you have permission to make that work. Copyright, in an Berne Convention country, which includes the EU, does not protect ideas and concepts, it protects expression. It protects the choices of words and symbols, and other forms of expression. If all you did was study example code, presented for educational purposes, and then write code that performs a similar function, using the same general techniques, then I don't think you have infringed copyright. That, after all, is why people post code to Stack Overflow and similar sites, to allow them to learn how to use specific coding techniques, including in commercial projects. I have used techniques posted to SO to do coding as part of my paid job. The usual test for copying under US law is "substantial similarity". This takes into account cases where there is essentially only one way to say or code something. I don't know the exact tests under the various laws of various EU countries, and they will not all be the same. But I suspect that on this point they are, well, substantially similar :). I can't advise on your specific situation. But if it is as described, I don't think you have a problem.
Written down computer code is subject to copyright. If you do not have the permission of the owner to copy it you are breaching their copyright unless your use constitutes fair use/dealing.