Here’s how to secure your PDF documents in Windows using a free utility called iSafePDF: 1. Go to http://isafepdf.eurekaa.org/download-isafepdf/ and download the file ‘iSafePDF-v1.3.0.zip’. 2. Extract the ‘iSafePDF.exe’ file from the downloaded file and run it. 3. Select a source PDF file and a target PDF file. 4. Now click on ‘Encryption’ and make sure...