加密

Documentize PDF Security for .NET 是一个强大的工具，旨在通过提供加密、解密和签名功能来增强 PDF 文档的安全性。它确保您的敏感信息保持机密，并防止未授权访问。

如何加密 PDF

要加密 PDF 文档，请按照以下步骤操作：

1. 创建 EncryptOptions 实例，并设置所需的用户密码和所有者密码。
2. 使用 AddInput 方法添加输入 PDF 文件。
3. 使用 AddOutput 方法添加输出 PDF 文件。
4. 使用 PdfSecurity 类的 Encrypt 方法执行加密。

1// Create EncryptOptions object to set instructions
2var options = new EncryptOptions("123456", "qwerty");
3// Add input file path
4options.AddInput(new FileData("path_to_your_pdf_file.pdf"));
5// Set output file path
6options.AddOutput(new FileData("path_to_result_pdf_file.pdf"));
7// Perform the process
8PdfSecurity.Encrypt(options);

关键特性：

• 加密 PDF 文档：通过添加用户密码和所有者密码来保护您的 PDF 文件。

• 自动化：将加密和解密集成到您的 .NET 应用程序中，实现自动化工作流。
• 合规性：确保您的文档符合行业文档安全标准。

解密

Documentize PDF 安全 for .NET 是一款强大的工具，旨在通过提供加密、解密和签名功能来提升 PDF 文档的安全性。它确保您的敏感信息保持机密，免受未授权访问的侵扰。

如何解密 PDF

要解密 PDF 文档，请按照以下步骤操作：

1. 创建 DecryptionOptions 实例，并提供必要的密码。
2. 使用 AddInput 方法添加输入 PDF 文件。
3. 使用 AddOutput 方法添加输出 PDF 文件。
4. 调用 PdfSecurity 类的 Decrypt 方法执行解密。

1// Create DecryptOptions object to set instructions
2var options = new DecryptOptions("123456");
3// Add input file path
4options.AddInput(new FileData("path_to_your_pdf_file.pdf"));
5// Set output file path
6options.AddOutput(new FileData("path_to_result_pdf_file.pdf"));
7// Perform the process
8PdfSecurity.Decrypt(options);

关键特性：

• 解密 PDF 文档：在需要时移除 PDF 的加密。
• 自动化：将加密和解密集成到您的 .NET 应用程序中，实现自动化工作流。
• 合规性：确保您的文档符合行业文档安全标准。

签名

The Documentize PDF Security for .NET component allows users to digitally sign PDF documents. It offers a streamlined process for adding signatures, ensuring authenticity, and securing PDF content. The component supports both visible and invisible signatures and provides options to customize the signature’s position, reason, contact information, and more.

How to Sign PDF Documents

To sign a PDF document using a PFX file, follow these steps:

1. Instantiate the SignOptions class with the PFX file path and password.
2. Add the input PDF and the output file to the options.
3. Run the Sign method to apply the signature.

1// Create SignOptions object to set instructions
2var options = new SignOptions("path_to_your_pfx_file.pfx", "password_of_your_pfx_file");
3// Add input file path
4options.AddInput(new FileData("path_to_your_pdf_file.pdf"));
5// Set output file path
6options.AddOutput(new FileData("path_to_result_pdf_file.pdf"));
7// Perform the process
8PdfSecurity.Sign(options);

How to Use Stream for PFX File

You can also sign a PDF using a PFX certificate provided as a stream instead of a file path. This allows more flexible handling of certificate storage.

1using var pfxStream = File.OpenRead(@"path_to_your_pfx_file.pfx");
2var options = new SignOptions(pfxStream, "password_of_your_pfx_file");
3options.AddInput(new FileData("path_to_your_pdf_file.pdf"));
4options.AddOutput(new FileData("path_to_result_pdf_file.pdf"));
5// Perform the process
6PdfSecurity.Sign(options);

How to Apply Invisible Signatures

To add an invisible signature (one that secures the document without displaying the signature on the document), simply set the Visible property to false.

1. Create an instance of SignOptions.
2. Set Visible to false.
3. Add input and output files.
4. Call Sign to apply the invisible signature.

1var options = new SignOptions("path_to_your_pfx_file.pfx", "password_of_your_pfx_file");
2options.AddInput(new FileData("path_to_your_pdf_file.pdf"));
3options.AddOutput(new FileData("path_to_result_pdf_file.pdf"));
4// Configure invisible signature
5signOptions.Visible = false;
6// Perform the process
7PdfSecurity.Sign(options);

How to use extra Options for signature of PDF Documents

You can use extra options during adding signature to a PFX file like Reason, Contact, Location, PageNumber.

1. Instantiate the SignOptions class with the PFX file path and password.
2. Add the input PDF and the output file to the options.
3. Set values for your options.
4. Run the Sign method to apply the signature.

 1// Create SignOptions object to set instructions
 2var options = new SignOptions("path_to_your_pfx_file.pfx", "password_of_your_pfx_file");
 3// Add input file path
 4options.AddInput(new FileData("path_to_your_pdf_file.pdf"));
 5// Set output file path
 6options.AddOutput(new FileData("path_to_result_pdf_file.pdf"));
 7// Optional parameters
 8options.Reason = "my Reason";
 9options.Contact = "my Contact";
10options.Location = "my Location";
11options.PageNumber = 3;
12// Perform the process
13PdfSecurity.Sign(options);

How to Add a Timestamp to PDF

To add a secure timestamp to a PDF document, follow these steps:

1. Create an instance of AddTimestampOptions to configure the timestamping process.
2. Add the input PDF file using the AddInput method.
3. Set the output file path using AddOutput.
4. Execute the timestamping using the Sign method.

1// Create SignOptions object to set instructions
2var options = new SignOptions("path_to_your_pfx_file.pfx", "password_for_your_pfx_file");
3options.TimestampOptions = new TimestampOptions("server_url");
4// Add input file path
5options.AddInput(new FileData("path_to_your_pdf_file.pdf"));
6// Set output file path
7options.AddOutput(new FileData("path_to_result_pdf_file.pdf"));
8// Perform the process
9PdfSecurity.Sign(options);

How to Use Custom Authentication with Timestamp Server

You can provide basic authentication credentials when connecting to the timestamp server. This allows you to authenticate with servers that require a username and password.

1// Configure the timestamping options with authentication
2options.TimestampOptions = new TimestampOptions("timestamp_server_url", "username:password");

Key Features:

• Digitally Sign PDF Documents: Secure your documents with visible or invisible digital signatures.
• PFX Support: Sign PDF files using a PFX certificate.
• Customizable Options: Configure signature settings like reason, location, and contact details.
• Visible and Invisible Signatures: Choose whether the signature is visible on the document.
• Customizable Timestamp Servers: Use custom timestamp server URLs and authentication credentials.