PDF Encrypt & Decrypt - Version 3.20 Protect your PDF files with passwords and prevent PDF files from being printed, changed, copied, extracted, signed, filled, assembled and/or merged. To decrypt PDF won't be difficult with this utility.Supported PDF Versions:PDF version 1.0 (Adobe Acrobat 1.x)PDF version 1.1 (Adobe Acrobat 2.x)PDF version 1.2 (Adobe Acrobat 3.x)PDF version 1.3 (Adobe Acrobat 4.x)PDF version 1.4 (Adobe Acrobat 5.x)PDF version 1.5 (Adobe Acrobat 6.x)PDF version 1.6 (Adobe Acrobat 7.x)PDF version 1.7 (Adobe Acrobat 8.x, 9.x, ISO 32000)Supported Platforms:Windows 7 Home BasicWindows 7 Home Premium