How to Store PDF eBooks Safely on eBook site (PHP, File Security)

I've recently delivered 3 projects related to secure PDF generation on the fly, and thus I'm in a good position to advise you on this matter. How are the PDF links being stored by your website? Are the links stored in a database? In that case, you can make the PDFs password protected, and add the password in the database along with the PDF name. When you are generating link for download, show the password to user, or better send it to them over email. The password should be different for each PDF, so that even if one knows the location of the file, they cannot unlock the file. The best practice in this regard would be to generate the password protected version on the fly, with password same as the user name. This will create a disincentive for user to share the PDF with others over email and other media, as their user-name will be exposed. If you like my advice feel free to create a suitable milestone towards advice fee (min 5$ will be deducted by FL as commission charges) and award the project for this advice. I can also develop the custom script for you, as a separate project, or as a new milestone to this project.

You can use url encryption or server side code or captcha so that people can't scrape your website.

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Hi, allow me to introduce myself, I am Abhirup Guha, a cyber security professional and secure web developer, having a team of ethical hackers and forensic investigators with in house R&D lab. I & my team can provide you best solution regarding server security, as i am having 8+ years in this field and also associated with TCG , CDTS, telegraph etc. We can even help you with a web audit to completely secure your E-application but that's completely optional.

hi i have 2 year experience in web application security. your application having insecure direct object refrence problem i can give you best solution for this problem.

I have more than 20 years' experience in web development, and I am also a degreed Librarian with a good understanding of the PDF format, security, and the needs of publishers. I have developed secure systems for document management for academic publishing that required a secure repository for documents that could only be accessed by the author of the document and the publishing team, not by other authors (or any other visitors to the site). I would typically build such a system on the proven Drupal CMS framework, which I have been using since 2009. I can tell you exactly how to do this with Drupal; or, if you would like to use another content management system or write a website from scratch (which I don't advise), I can alternatively research and write up a plan for you to explore further. The work product that I will deliver will be a 1-2 page writeup of the correct method or approach; it will include instructions and links to relevant information online that will help you complete your project. (After receiving this document, you can engage me to build this functionality into your site, under a future project/bid). This bid only includes research and written advice, not development work. Thank you for considering me!