Digital information always has threats of being forged, tampered or misused by unauthorized users. Therefore, various security measures are taken to ensure the protection of the information. Accordingly, this article targets the protection of MS PowerPoint presentations programmatically. Particularly, you will learn how to protect PowerPoint PPT slides in Java. We will explicitly demonstrate how to secure PowerPoint presentations with passwords or digital signatures.
- Java API to Protect PowerPoint PPT
- Protect PowerPoint PPT with a Password
- Add Digital Signature in PPT in Java
- Verify Digitally Signed PowerPoint PPT
- Get a Free API License
Java API to Protect PowerPoint PPT - Free Download
To protect the PowerPoint PPT, we will use Aspose.Slides for Java. It is a powerful and feature-rich API for creating, manipulating, and converting PowerPoint files. Furthermore, it lets you protect PowerPoint PPTX/PPT presentations using passwords or digital signatures. You can either download the API or install it via Maven.
<repository>
<id>AsposeJavaAPI</id>
<name>Aspose Java API</name>
<url>https://repository.aspose.com/repo/</url>
</repository>
<dependency>
<groupId>com.aspose</groupId>
<artifactId>aspose-slides</artifactId>
<version>21.1</version>
<classifier>jdk16</classifier>
</dependency>
Secure PowerPoint PPT with a Password in Java
The following are the steps to protect a PowerPoint PPT presentation with a password in Java.
- First, load PPTX presentation using Presentation class.
- Encrypt presentation with a password using Presentation.getProtectionManager().encrypt(String) method.
- Finally, save the presentation using Presentation.save(String, SaveFormat) method.
The following code sample shows how to secure a PowerPoint PPT in Java.
Secure PowerPoint PPT with Digital Signature in Java
You can also digitally sign PowerPoint presentations to ensure the authenticity of their content. The following are the steps to add a digital signature to a PPT presentation in Java.
- Load PPTX presentation using Presentation class.
- Create a new digital signature using DigitalSignature class.
- Add comments for signature using DigitalSignature.setComments(String) method.
- Digitally sign the PowerPoint presentation using Presentation.getDigitalSignatures().add(DigitalSignature) method.
- Save the updated presentation using Presentation.save(String, SaveFormat) method.
The following code sample shows how to protect PPT with a digital signature in Java.
Verify Protected PowerPoint PPT in Java
In addition to adding digital signatures, you can also verify the existing signatures in a PowerPoint presentation. The following are the steps to verify digital signatures in a PPTX file.
- Load PPTX presentation using Presentation class.
- Loop through each IDigitalSignature in the collection returned by Presentation.getDigitalSignatures() method.
- Check signature’s validity using IDigitalSignature.isValid() method.
The following code sample shows how to verify digital signatures in PowerPoint PPTX files using Java.
Java API to Secure PPT Presentations - Get a Free License
You can get a free temporary license to protect PowerPoint PPT without evaluation limitations.
Conclusion
In this article, you have learned how to protect MS PowerPoint PPT in Java. In particular, you have seen how to secure PowerPoint presentations with a password or digital signatures. Furthermore, you can explore more about the Java presentation manipulation API using documentation.