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Although nowadays we have Email, SMS services integrated in most of web applications, sometimes there could be need of documentation for future reference which users may want to reuse later based on their need. Similar requirement we had in one of our web application where we wanted to provide option to user to generate single or bulk PDF files out of any HTML templates they have in their account. There was different features around the generation of PDF document but major work was involved in…

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In one of our Rails application, we needed to generate password protected PDFs. We used wicked_pdf (an awesome gem that generates PDFs from HTML template) to generate PDFs but it doesn't provide feature to secure it.

While searching for solution to secure PDFs we came across PDFtk (PDF toolkit). It is a cross-platform tool for manipulating PDF documents. It has feature to add password to PDF document using "user password" as well as "master password" (owner password) which is great.

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