copy-protection

问题 I'm programming an application in my company, and there is a file watcher: fsw.NotifyFilter = (NotifyFilters.Security Or NotifyFilters.LastAccess Or NotifyFilters.LastWrite) AddHandler fsw.Changed, New FileSystemEventHandler(AddressOf OnChanged) AddHandler fsw.Created, AddressOf OnChanged AddHandler fsw.Renamed, AddressOf OnRenamed AddHandler fsw.Deleted, AddressOf OnChanged But I want to protect some files from users by send it in skype, messanger oruploading it to any cloud. Ex. I have an

问题 I'm developing a new website with PHP & MySQL. The website is for an online eBook library that grant access to its books based on paid subscription plans. So, I need to make sure the PDF files of these books are well protected and can't be saved, downloaded, or in anyway copied. How can I do that? 回答1: I suggest you to convert the PDF into an image , and display the first page or as you like, check this library it can be useful Imagemagick 回答2: I think this is not a PHP or MYSQL solution. PDF

问题 Closed. This question is off-topic. It is not currently accepting answers. Want to improve this question? Update the question so it's on-topic for Stack Overflow. Closed 3 years ago . I'm providing a free sample page that will be downloaded from my website that is in .pdf format. I want to prevent users from selecting and copying the text content of that document. How can I do this for free? 回答1: With Adobe Acrobat, you can create passwords to protect pdf files. But others can still use some

问题 Closed . This question needs to be more focused. It is not currently accepting answers. Want to improve this question? Update the question so it focuses on one problem only by editing this post. Closed 4 years ago . I have some trial software that I wish to distribute to clients. I want the trial based software to stop working 30 days after installed. A simple check of the system date in the software is the most straightforward way to achieve this, but couldn't a client easily circumvent this

问题 I need to migrate a huge application to Windows Azure. The application depends on a third-party library that requires an activation key stored in a special binary file on the role instance filesystem. Obviously that key has to be either included into the role package or stored somewhere where role can fetch it. The activation key will not be bound to the machine (since I have no idea where exactly a role will be run in the cloud) so anyone can use it to make a copy of that library work. Since

问题 Closed . This question needs to be more focused. It is not currently accepting answers. Want to improve this question? Update the question so it focuses on one problem only by editing this post. Closed 4 years ago . Applications often have registration keys. It can arguably be placed in a file or in the registry. Sometimes, an application is deactivated by entry of another key, or the passing of a date, etc. Where can one safely store such information about an application be deactivated? A

问题 I'd like be able to make a time-limited trial version of my application, but I'm not sure how I can reliably determine whether or not the user attempted to reinstall the application after the expiration date. I could likely store the initial installation date in a storage location that wouldn't get erased upon uninstall, but this doesn't seem like an ideal method. Does Google Play's Application Licensing support this feature, or is there another acceptable way to accomplish this? 回答1: To echo

问题 I want to write a script in PHP and javascript and somehow protect my source code so that I can sell my script. I am looking for ideas how to protect my script. If I sell it to someone, how can I stop that person from redistributing it as their product? I know there is ZEND and ionCube, but are there any other methods? As I don't like to force a user to have zend optimizer installed on the server. Is there any way of generating a "serial number" protection for these scripts that cannot be

问题 I want to write a script in PHP and javascript and somehow protect my source code so that I can sell my script. I am looking for ideas how to protect my script. If I sell it to someone, how can I stop that person from redistributing it as their product? I know there is ZEND and ionCube, but are there any other methods? As I don't like to force a user to have zend optimizer installed on the server. Is there any way of generating a "serial number" protection for these scripts that cannot be

问题 Closed. This question is off-topic. It is not currently accepting answers. Want to improve this question? Update the question so it's on-topic for Stack Overflow. Closed 4 years ago . Same intro as my last question: I am re-writing and/or consolidating a bunch of my "app framework" classes (basic mainform, about box, locking routines & purchase linking, auto-update, datamodule initializer, etc) -- Basically, I have a number of small potential shareware apps that I'm wanting to get out the