The key used for these kinds of symmetric encryption is called as File Encryption Key (or FEK). This FEK is in return encrypted with a public or a private key algorithm like RSA and stored with the ...

The World Wide Web can be a dangerous place, and if you use a computer in your small business, you need to protect your sensitive data. One way to protect your data is by encrypting PDF files. If you ...

While PDFs are generally regarded as fairly stable files, there’s a lot you can do with them on both Linux and other systems. This includes merging, splitting, rotating, breaking into single pages, ...