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How to password-protect a PDF file in less than 30 seconds

The widely used PDF format supports data-saving encryption, allowing you to protect sensitive documents so that only those with the correct password can access them. In the old days, you’d need a ...
HowToGeek on MSN

4 Ways to Password-Protect a PDF File on Windows 11

If you have a confidential PDF you want to password protect, you have a few ways to do that on your Windows 11 PC. You can ...
TWCN Tech News

Password Protect PDF Online using these free tools

iLovePDF brings different PDF tools to sign PDF documents, edit PDF, convert PDF to PDF/A, Excel, Word, reorder or rearrange PDF pages, and more. Among those tools, a Protect PDF tool is also there ...
窓の杜

PDFファイルの有効期限を設定できるソフト「PDF Lock」v1.00が公開

PDFファイルの有効期限を自由に設定できるソフト「PDF Lock」v1.00が、2日に公開された。Windows 98/Me/2000/XPに対応するフリーソフトで、現在ベクターのライブラリページからダウンロードできる。 「PDF Lock」は、任意のPDFファイルの有効期限を自由に設定できる ...