protectingpdf

Open the PDF and choose Tools > Protect > Encrypt > Encrypt with Password. If you receive a prompt, click Yes to change the security. Select Require a Password ...

2023年12月18日 — To encrypt a file from the main toolbox screen, click the Protect PDF button. Select the file or drag it onto the screen, create a password, and ...

How to Password Protect Digitally Signed PDF Documents. 1. Open the PDF and choose File > Print > Adobe PDF > Print. 2. Type the file name, and click Save.

Password protect PDF files with this free and secure password tool. Encrypt a PDF with a password to ensure that sensitive content is kept private.

No file size limits, no ad watermarks - A simple and secure web app to encrypt your PDF files with strong AES 128-bit encryption for free.

Protect your PDF files online by adding a password that will prevent people from being able to copy or print your PDF document. Secure PDF files for free.

Encrypt and protect PDF with a password to safeguard sensitive information. Secure your PDF files online, with ease and without registration.

2023年6月5日 — 在Acrobat 中開啟PDF，然後執行以下任一操作：. 選擇「工具 > 保護 > 更多選項 > 以密碼加密」。 選擇「檔案 > 以密碼保護」，然後從「更多選項」中選擇「 ...

按一下上方的「選取檔案」按鈕，或將PDF 拖放至放置區。 · 輸入密碼，然後再次輸入以確認密碼。 · 按一下「設定密碼」。 · 下載受密碼保護的PDF 文件，或登入以共用文件。

設置一個密碼來保護PDF文檔中的敏感資訊。輕鬆地線上保護你的PDF文檔，且無需註冊。