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Encrypt PDF via Java SDK

API for encrypting PDF documents using Aspose.PDF Cloud Java SDK

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Aspose.PDF Cloud Java SDK Aspose.PDF Cloud Java SDK

Overview

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How to encrypt PDF via Cloud Java SDK

In order to encrypt PDFs via Cloud Java SDK , we’ll use Aspose.PDF Cloud Java SDK This Cloud SDK allows you to easily build cloud-based PDF creator, editor & encryption apps in Java language for various cloud platforms. Open Repository package manager, search for Aspose.PDF Cloud and install. You may also use the following command from the Package Manager Console for install it using Maven.

Add Aspose Cloud repository to your application pom.xml

Add Aspose Cloud repository


    <repositories>
        <repository>
            <id>aspose-cloud</id>
            <name>Aspose Cloud Repository</name>
            <url>https://releases.aspose.cloud/java/repo/</url>
        </repository>
    </repositories>

To install the API client library to your local Maven repository, simply execute:

Installation from Github


    mvn clean install

To deploy it to a remote Maven repository instead, configure the settings of the repository and execute:

Deploy Maven repository


    mvn clean deploy

Steps to encrypt PDF via Java

Aspose.PDF Cloud developers can easily load & encrypt PDF in just a few lines of code.

  1. Initialize the Aspose PDF API
  2. Upload your encrypted document file
  3. Call API to Encrypt Pdf.
  4. Checks the response and logs the result.
  5. Downloads the updated file for local use.
 

Encrypt PDF using Cloud Java SDK


    package com.aspose.asposecloudpdfusecases.encrypt_decrypt;

    import java.io.File;
    import java.nio.file.Path;
    import java.nio.file.StandardCopyOption;
    import java.util.Base64;
    import com.aspose.asposecloudpdf.api.PdfApi;
    import com.aspose.asposecloudpdf.model.AsposeResponse;
    import com.aspose.asposecloudpdf.model.CryptoAlgorithm;
    import com.aspose.asposecloudpdfusecases.AppHelper;

    public class EncryptPdfDocument {
        public static void Encrypt() {
            String LOCAL_FOLDER = "C:\\Samples\\";
            String REMOTE_FOLDER = "Your_Temp_Pdf_Cloud";
            String PDF_DOCUMENT = "sample.pdf";
            String PDF_OUTPUT = "output_sample_encrypted.pdf";
            String ENCRYPT_ALGORITHM = CryptoAlgorithm.AESX256.getValue();
            
            String USER_PASSWORD =  "User-Password";
            String USER_PASSWORD_BASE64 = Base64.getEncoder().encodeToString(USER_PASSWORD.getBytes());
            
            String OWNER_PASSWORD = "Owner-Password";
            String OWNER_PASSWORD_BASE64 = Base64.getEncoder().encodeToString(OWNER_PASSWORD.getBytes());

            try{
                PdfApi pdfApi = new PdfApi(API_KEY, API_SECRET);

                // upload local PDF file to remote storage
                File file = new File(Path.of(LOCAL_FOLDER, PDF_DOCUMENT).toString());
                pdfApi.uploadFile(Path.of(REMOTE_FOLDER, PDF_DOCUMENT).toString(), file, null);
                System.out.println(String.format("File '%s' successfully uploaded!", Path.of(LOCAL_FOLDER, PDF_DOCUMENT).toString()));

                AsposeResponse response = pdfApi.postEncryptDocumentInStorage(
                    PDF_DOCUMENT, USER_PASSWORD_BASE64, OWNER_PASSWORD_BASE64, ENCRYPT_ALGORITHM,
                    null, null, null, REMOTE_FOLDER);

                if (response.getCode() != 200)
                    System.err.println("Error: unexpected error when encrypting document! '" + response.getStatus() + "'");
                else {
                    // download changed PDF file from remote folder...
                    File f = pdfApi.downloadFile(Path.of(REMOTE_FOLDER , PDF_DOCUMENT).toString(), null, null);
                    java.nio.file.Files.copy(Path.of(f.getPath()), Path.of(LOCAL_FOLDER, PDF_OUTPUT), StandardCopyOption.REPLACE_EXISTING);
                    System.out.println(String.format("File '%s' successfully dowloaded!", Path.of(LOCAL_FOLDER, PDF_OUTPUT).toString()));                
                    System.out.println("Successfully encrypted document ! '" + PDF_OUTPUT + "'");
                }
            } catch (Exception e) {
                e.printStackTrace();
            }

        }
    }
 

Encrypt PDF

Encrypting a PDF document is a simple yet powerful way to protect sensitive content, ensure privacy, and maintain control over how the document is used. Whether you’re sharing business contracts, financial reports, or personal records, encryption helps safeguard your information from unauthorized access, tampering, or misuse.

By applying encryption and setting appropriate permissions, you enhance the document’s security, ensure compliance with industry regulations, and build trust with your audience. In today’s digital world, PDF encryption is not just a feature—it’s a necessity for responsible data handling. Encrypt PDF documents with Aspose.PDF Cloud Java SDK.

With our Java library you can:

  • Add PDF document’s header & footer in text or image format.
  • Add tables & text or image stamps to PDF documents.
  • Append multiple PDF documents to an existing file.
  • Work with PDF attachments, annotations, & form fields.
  • Apply encryption or decryption to PDF documents & set a password.
  • Delete all stamps & tables from a page or entire PDF document.
  • Delete a specific stamp or table from the PDF document by its ID.
  • Replace single or multiple instances of text on a PDF page or from the entire document.
  • Extensive support for converting PDF documents to various other file formats.
  • Extract various elements of PDF files & make PDF documents optimized.
  • You can try out our free Apps to test the functionality online.

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