About digital signatures and certificates in Office, and buying a digital certificate from a certificate authority or create your own.

Want to add a padlock to your email messages? You can use encryption and digital signatures in new Outlook, classic Outlook, and Outlook on the web for work or school accounts to increase the security of messages. Encrypting an email message in Outlook means it's converted from readable plain text into scrambled cipher text. Only the recipient who has the private key that matches the public ...

在 Microsoft 365 文件中插入签名行时，作者可以指定有关预期签名者的信息以及签名者的说明。 当将文件的电子副本发送给预期签名人后，此人将看到签名行和要求其签名的通知。

Select Edit contact, and then select Save & Close. View a certificate for a contact On the Navigation bar, select People. Select the person's name, and then on the Contact tab, select Certificates. Digitally sign a single message in classic Outlook In the message, on the Options tab, in the Encrypt group, select Sign.

本文介绍如何获取或创建用于 Office 文档的数字签名。 若要详细了解如何在 Office 文档中使用它们，请参阅 在 Office 文件中添加或删除数字签名。

To learn about digital signatures (also known as digital ID), what they can be used for, and how to them in Word, Excel, and PowerPoint, see All about digital signatures. Create a signature line in Word or Excel In the document or worksheet, place your pointer where you want to create a signature line. On the Insert tab, select Signature Line in the Text group. In the Signature Setup dialog ...

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Send S/MIME or Microsoft Purview encrypted emails in Outlook using a work or school account with a qualified Microsoft 365 subscription.

在设计表单模板时，可以指定用户能够在填写基于表单模板的窗体时使用的数字签名。 对于许多相同的原因，您可能登录纸张文档，可以使用数字签名。 数字签名用于验证数字信息 — 例如表单模板、 表单、 电子邮件和文档-通过使用计算机加密。

How to add a signature to your Word documents. You can also use the Signature Line command in Word to insert a line to show where to sign a document.