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- 1Password Protect PDF - Encrypt your PDF Online - Soda PDF
Write out or encrypt your PDF file: choose the password you wish to use to protect your file. Ent...
- 2How to Password Protect PDF Documents
How to Password Protect Digitally Signed PDF Documents. 1. Open the PDF and choose File > Print >...
- 3免費PDF 密碼保護| Adobe Acrobat (台灣)
- 4Home - PDFEncrypt - Password protect PDF files for free ...
PDFEncrypt is a free, open-source utility to encrypt PDF files using standard PDF encryption algo...
- 5How to encrypt a PDF document
Confidential PDF documents can be encrypted and protected with a password. Only people who know t...
