你有不想让别人看到的私人文件或重要的工作演示吗？(work presentation)
您可以通过密码保护文件来保护Word 或 PDF 文档(Word or PDF document)中的私人和敏感信息。这会加密文件的内容，因此任何人都无法访问它，也无法在没有先输入密码的情况下被任何程序读取。
有几个选项可以对Word 或 PDF 文档(Word or PDF document)的内容进行密码保护，并限制对(limit access)Word 和 PDF 文档(Word and PDF documents)的访问权限。
密码保护 Word 文档(Password-Protect a Word Document)
您可以使用密码保护Word 文档(Word document)，通过防止未经授权的访问来帮助保护您的内容安全。该程序提供不同的保护级别，包括使用密码锁定文档，以及配置适合您需要的不同保护设置。
但是，这些功能在Word Online(Word Online)中不可用，但您可以控制文件共享并决定其他人是否具有对内容的编辑权限(edit access)，甚至可以打开它们。
如果您使用的是Google 文档(Google Docs)，您的文档会受到您的Google 帐户(Google account)密码的保护，因为该服务不(service doesn)支持密码保护(support password protection)。请注意不要泄露您的帐户密码或(account password or share)与任何人共享文档，您是安全的。
以下步骤适用于Windows版(Windows)Microsoft Word 2010或更高版本的用户， Mac用户可使用备用路径。
如何在 Windows 中对 Word 文档进行密码保护(How To Password-Protect a Word Document In Windows)
- 启动 Microsoft Word 并单击File>Open并找到您想要密码保护的文档。
- 再次单击文件(File)并从左侧窗格中选择信息。(Info)
- 选择保护文档(Protect Document)。
- 从下拉菜单中，选择使用密码加密(Encrypt with Password)。输入一个您能记住的密码，当任何人试图打开此文档时都需要该密码。
- 在“保护文档”(Protect Document)部分，您会看到一条消息，提示您需要密码才能打开此文档(a password is required to open this document)。
如何在 macOS 中使用密码保护 Word 文档(How To Password Protect a Word Document In macOS)
如果您使用的是 macOS，则这些步骤与Windows 操作系统(Windows operating)略有不同。
- 打开要通过密码保护锁定的(password protection)Word 文档(Word document)，然后单击“审阅”(Review)选项卡。
- 单击保护文档(Protect Document)。您将看到覆盖主Word 窗口的(Word window)密码保护对话框(Password Protect)
- 在设置密码以打开此文档(Set a password to open this document) 字段中输入密码，然后再次重新输入(field and re-enter)所选密码(chosen password)以确认。在设置密码以修改此文档(Set a password to modify this document)字段中，输入密码并再次重新输入(password and re-enter)密码
- 单击确定(OK)。从现在开始，当用户打开文档时，系统会提示他们输入密码。他们可以阅读和编辑它，除非作者使用了额外的保护措施( additional protections)。
注意:(Note: )密码不可恢复(t recoverable)，因此请确保输入一个您能记住的密码，或将其存储在安全的地方。它们也区分大小写，最长可达 15 个字符。
如何从 Word 文档中删除密码保护限制(How To Remove Password Protection Restrictions From a Word Document)
如果您使用密码保护锁定了(password protection)Word 文档(Word document)并且想要解锁它，请以文档所有者身份登录并针对(document owner)Windows或 macOS重复上述步骤，直到您返回“保护文档”(Protect Document)按钮。
对于 Windows 用户：(For Windows Users:)
- 单击Protect Document>Encrypt with Password。
在“保护文档”(Protect Document)部分，现在将显示：任何人都可以打开、复制和更改此文档的任何部分(Anyone can open, copy and change any part of this document)。
对于 macOS 用户：(For macOS Users:)
- 单击审阅(Review )选项卡。
- 单击保护文档(Protect Document)。
- 从提供的字段中删除密码。
- 选择确定(OK)以解锁文档。
密码保护 PDF 文档(Password Protect a PDF Document)
无论您使用的是Windows 还是 macOS(Windows or macOS)，都可以使用多种方法对PDF 文档( PDF document)进行密码保护。值得庆幸的是，与Microsoft Word不同， (Microsoft Word)PDF(PDFs)内置了对密码保护加密的支持。
我们将向您展示如何使用Adobe Acrobat 和 Microsoft Word对(Adobe Acrobat and Microsoft Word)PDF进行密码保护。如果您对更改您的PDF更感兴趣，我们也有一个关于编辑 PDF 的最简单方法( easiest ways to edit a PDF)的简单指南。
使用 Adobe Acrobat
您可以对PDF 文档(PDF document)进行加密、添加证书或密码并控制对文件的访问。
在组织或团队设置中(organization or team setting)，您还可以创建自定义安全策略，每个人每次都可以使用相同的方式为PDF应用(PDFs)密码保护。(password protection)
Acrobat Pro DC 包含“发布敏感信息(Publish Sensitive Information)”操作，该操作可引导您完成多个步骤以对文件进行密码保护，同时自动应用编辑和复制限制(edit and copy restrictions)。
如果您还没有在您的计算机上安装它，并且不想为此付费，您可以使用免费的 7 天试用版(free seven-day trial)并访问此功能。
- File>Open要密码保护的PDF 文档(PDF document)。
- 再次单击文件(File)并选择属性(Properties)。
- 在安全选项卡中，单击(Security )安全方法(Security Method)旁边的下拉菜单，然后选择密码安全(Password Security)。
- 在文档打开(Document Open)部分下，选中需要密码才能打开文档(Require a password to open the document)框。
- 在文本框中输入密码。
- 保存PDF 文档(PDF document)以将打开密码写入其中。
使用微软 Word
您永远不会想到可以使用Microsoft Word对(Microsoft Word)PDF进行密码保护。您可以先将 PDF 创建为Word 文档(Word document)，然后使用密码对其进行加密，从而对PDF进行密码保护。(PDF)
- 打开Microsoft Word并创建一个文档（如果您的文档已经是PDF 格式(PDF format)，您可以先将PDF转换为Word，然后执行以下步骤）。
- 单击File>Save as。
- 从保存类型(Save as type)下拉菜单中，选择PDF格式。
- 在弹出框中，选中使用密码加密文档(Encrypt the document with a password)框。输入您的密码两次以确认。
这些是您可以使用密码保护Word 和 PDF 文档(Word and PDF document)的不同方法。确保选择一个没有人能猜到或破解的强密码。
如果您不擅长记住密码，我们关于最佳密码管理器的文章有一些很好的选择可以帮助您。
How To Password-Protect Word & PDF Documents
Have you got a private document or important work presentatіon yоu don’t want people to see?
You can protect private and sensitive information in a Word or PDF document by password-protecting the file. This encrypts the file’s contents so it can’t be accessed by anyone, or read by any program without entering the password first.
There are several options to password-protect the contents of a Word or PDF document, and limit access permissions on your Word and PDF documents.
Password-Protect a Word Document
You can protect a Word document using a password to help keep your content safe and secure, by preventing unauthorized access. The program offers different protection levels including locking documents with a password, and configuring different protection settings suited to your needs.
These features aren’t available in Word Online, though, but you can control file sharing and dictate whether or not someone else has edit access to the content, or even open them.
If you’re using Google Docs, your documents are protected by your Google account password, as the service doesn’t support password protection. Just be careful not to give out your account password or share the document with anyone, and you’re safe.
The steps below apply to users of Microsoft Word 2010 or later for Windows, with alternate paths for Mac users.
How To Password-Protect a Word Document In Windows
- Launch Microsoft Word and click File>Open and find the document you wish to password protect.
- Click File again and select Info from the left pane.
- From the drop down menu, select Encrypt with Password. Enter a password that you can remember and that’ll be required when anyone attempts to open this document.
- Click OK. Enter the password again and click OK.
- In the Protect Document section, you’ll see a message that says a password is required to open this document.
How To Password Protect a Word Document In macOS
If you’re using macOS, the steps are a little bit different from the Windows operating system.
- Open the Word document you want to lock via password protection and click the Review tab.
- Click Protect Document. You’ll see the Password Protect dialog overlaying the main Word window
- Enter a password in the Set a password to open this document field and re-enter the chosen password a second time to confirm it. In the Set a password to modify this document field, enter a password and re-enter the password a second time
- Click OK. From this point forward, when a user opens the document, they’ll be prompted to enter the password. They can read and edit it, unless the author used additional protections.
Note: The passwords aren’t recoverable so make sure you enter one that you can remember, or store it somewhere safe. They’re also case-sensitive and can be up to 15 characters in length.
How To Remove Password Protection Restrictions From a Word Document
If you locked a Word document using password protection and you want to unlock it, sign in as the document owner and repeat the steps above for Windows or macOS until you’re back at the Protect Document button.
For Windows Users:
- Click Protect Document>Encrypt with Password.
- Remove the password field.
- Click OK to unlock the document.
In the Protect Document section, it’ll now read: Anyone can open, copy and change any part of this document.
For macOS Users:
- Click the Review tab.
- Click Protect Document.
- Remove the password from the field provided.
- Select OK to unlock the document.
Password Protect a PDF Document
Whether you’re using Windows or macOS, there are several ways you can use to password protect a PDF document. Thankfully, PDFs have built-in support for password-protected encryption, unlike Microsoft Word.
We’re going to show you how to password protect a PDF using Adobe Acrobat and Microsoft Word. If you’re more interested in making changes to your PDF, we have a simple guide on the easiest ways to edit a PDF too.
Using Adobe Acrobat
You can encrypt, add a certificate or a password to a PDF document and control access to your file.
In an organization or team setting, you can also create custom security policies that everyone can use to apply password protection for PDFs the same way each time.
Acrobat Pro DC includes the Publish Sensitive Information action that guides you through several steps to password-protect your file, while automatically applying edit and copy restrictions.
If you haven’t installed it on your computer, and don’t want to pay for it, you can use the free seven-day trial and access this feature.
- Open the PDF document you want to password protect by going to File>Open.
- Click File again and select Properties.
- In the Security tab, click the drop-down menu next to Security Method and select Password Security.
- Under the Document Open section, check the Require a password to open the document box.
- Enter a password in the textbox.
- Save the PDF document to write the open password to it.
Using Microsoft Word
You’d never have guessed that you can use Microsoft Word to password-protect a PDF. You can password-protect a PDF by first creating it as a Word document and then encrypting it with a password.
- Open Microsoft Word and create a document (if your document is already in PDF format, you can convert the PDF to Word first, and then take the steps below).
- Click File>Save as.
- From the Save as type drop down menu, select PDF format.
- In the popup box, check the Encrypt the document with a password box. Enter your password twice to confirm it.
These are the different ways you can password protect a Word and PDF document. Make sure you choose a strong password that no one can guess or crack.
If you’re not good at remembering passwords, our article on the best password managers has some great options that can help you with that.
