There are different security levels that you can provide to your confidential documents. You can apply watermarks, encrypt files, or you can make your documents password-protected. In this article, we will see how to programmatically add password protection to the PDF files within the Java applications. Further, we will learn to change the password and also to remove the passwords to unlock PDF files.
本文讨论了以下主题:
- 用于 PDF 文件密码保护的 Java API *用Java密码保护PDF文件 * 在 Java 中更改 PDF 密码 * 如何删除 PDF 密码 - 解锁 PDF
Today, we will provide password protection to our presentation files programmatically. In this article, we will see how to lock PowerPoint presentation files with password protection in C#. Further, we will learn to unlock these by removing the password and also how to change the existing password of PPT & PPTX presentation files.
本文讨论了以下主题:
- .NET API 使用密码保护 PowerPoint PPT/PPTX * 通过添加密码锁定 PowerPoint 文件 * 在 C# 中更改 PPT/PPTX 密码 * 如何删除 PowerPoint 演示文稿密码
Let us learn to secure our documents from unauthorized access. Previously we discussed [adding text and image watermarks to the documents][1] to avoid and illegal use. In this article, we will see how to add password protection to PDF documents to get them locked using C#. Additionally, we will change the existing password and also learn to remove the password to make the PDF unlocked.
本文讨论了以下主题:
- .NET API 用于 PDF 文件的密码保护 * 通过添加密码锁定 PDF 文件 * 在 C# 中更改 PDF 密码 * 如何删除 PDF 密码 - 解锁 PDF