Digital information always has threats to be forged, tampered or misused by unauthorized users. Therefore, various security measures are taken to protect the information. In accordance with that, this article targets the protection of MS PowerPoint PPTX/PPT presentations programmatically. Particularly, you will learn how to protect PowerPoint files using passwords or digital signatures in Java.
- Java API to Protect PowerPoint Files
- Protect PowerPoint PPTX with a Password
- Protect PowerPoint Files using Digital Signature
- Verify Digitally Signed PowerPoint Presentations
- Get a Free API License
Java API to Protect PowerPoint Files
In order to protect the PowerPoint files, 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>Protect PowerPoint PPTX with a Password using Java
The following are the steps to protect a PowerPoint PPTX file with a password using Aspose.Slides for Java.
- First, load PPTX presentation using Presentation class.
- Encrypt presentation with a password using Presentation.getProtectionManager().encrypt(String) method.
- Finally, ave the presentation using Presentation.save(String, SaveFormat) method.
The following code sample shows how to protect a PowerPoint PPTX file using Java.
Protect PowerPoint Files using Digital Signature using Java
You can also digitally sign PowerPoint PPTX presentations in order to ensure the authenticity of its content. The following are the steps to add a digital signature to a PPTX file.
- 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 digitally sign PowerPoint presentations using Java.
Verify Digitally Signed PowerPoint Presentations 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.
Get a Free API License
You can get a free temporary license in order to try the API without evaluation limitations.
Conclusion
In this article, you have learned how to protect MS PowerPoint files using Java. In particular, you have seen how to digitally sign or protect PPTX files using a password. Furthermore, you can explore more about the Java presentation manipulation API using documentation.
