This tool will help you encrypt or remove encryption of an encrypted PDF file.
Boxoft PDF Security is a desktop utility program that lets you set various security parameters of a PDF file quickly and easily. With Boxoft PDF Security, you can protect PDF files with 128 bit encryption, or remove existing password protection and copy and print the PDF files after decryption. This has a simple and easy to use interface. It is intuitive enough that most users should get familiar with it quite easily. Getting productive with it should not take much time. The program can process a batch of files at a time. This should save you time and let you gain in productivity. Beside the batch mode, this program also offers a hot folder mode. Any file dropped into the hot folder will be processed by the tool immediately and automatically.
Metadata properties, such as PDF Title, Subject, Author and Keywords, etc. could be changed in a batch. Using a macro you could change items selectively even in a batch. Document open password could be set, you would be able to set expiry Time and date to the documents. Restrictions that can be set include print prevention, protecting from copy of text/graphics and editing/changes in the content. The software uses 40 or 128 bit RC4 encryption when encrypting a document. Once purchased, you are assured of receiving upgrades through its lifetime. This is a good product. It has many useful features. If you were looking for a product like this, this is one you could try out.