As security is an ever present issue we thought we would highlight some security features offered by the PDF file format that can be enabled if you want to control or limit which actions users can perform. This blog post will cover what type of actions you can prevent and some different authentication techniques that…
Over the past few weeks at IDRsolutions we have been creating methods that will decrypt an encrypted PDF using Java’s Cryptography Architecture (JCA). Previously we only allowed decryption if the Bouncy Castle jar had been included in the classpath. We wanted to remove this dependency so that the decryption code would still function correctly. BUT we also wanted to…
Many people have PDF files which are password protected but for which they no longer have the password, often for perfectly innocent reasons. So they are ask, can JPedal just ignore the password and display the file. The answer is no because the password is not stored in the PDF just to check against, but…
One of the big issues of the Internet revolution is protecting digital content. How do you stop people freely distributing your material without paying for it? The PDF file format has lots of encryption and security features within the file but how do you stop people from editing or copying from a PDF file and…
