Here are the top 2 most popular pdf protection softwares as derived from our TpSort Score which is a continually popular score, it denotes an estimated popularity of a software.
iSafePDF is a free open source PDF protection software.It allows you to encrypt PDF document, sign them using a certificate and timestamp the signature.All those features are PDF standards so your document will be readable/editable with all standard PDF programs.......
Wonderfulshare PDF Protect is a powerful application which could be used to encrypt, secure and lock your PDF files with owner password and user password. It enables you to protect your PDF files from unauthorized access, with as little effort as possible.Quick and easy - get started right awayEncrypt PDF......
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