> For the complete documentation index, see [llms.txt](https://docs.apryse.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.apryse.com/web/security/security.md).
# PDF Security with JavaScript PDF Viewer
Protect your documents with encryption, watermarks, and permissions. Learn how to enable DRM support and secure your PDFs effectively. Explore PDFSecure tool for added security. The Apryse Web SDK str
{% hint style="info" %}
**Requirements**
*These packages are required to use these features in production. Trial keys have unlimited access to all features*
Package: SecurityLive demo
{% endhint %}
Security on a PDF document protects the content from unauthorized access like copying or printing. PDF documents can be secured and encrypted using various encryption schemes. Control over document security in Apryse SDK is performed through *security handlers*. Security handlers perform user authorization and sets various permissions over PDF documents.
Apryse SDK benefits include:
* Support for Standard PDF security handler (40 and 128 bit RC4 encryption)
* Support for 128 and 256 bit AES (Advanced Encryption Standard) encryption
* Support for custom security handlers
* Support for Crypt encryption filters
* Set or modify security permissions associated with a document
* Remove encryption from existing PDF documents
* Powerful extension mechanism allowing for seamless integration with client applications
## Demos
[Document Encryption](https://showcase.apryse.com/password-protect) [Watermarks](https://showcase.apryse.com/add-watermark) [Annotation Permissions](https://showcase.apryse.com/annotation-permissions) [Redaction](https://showcase.apryse.com/redaction)
## Get started
[Enable DRM support](/web/security/xod-and-encryption.md) To enable digital rights management (DRM) support by utilizing XOD AES security.
[Securing a document with encryption](/web/security/encrypt.md) To secure a document with password protection and adjusting permissions on the document.
[Reading a document with encryption](/web/security/decrypt.md) To read a document with password protection without user feedback.
## Tools & Utilities
[PDFSecure](/cli/pdfsecure/pdf-secure.md) A command-line tool that can be used for adding, removing, or changing security settings on existing PDF documents or whole directories of documents.
## Related blogs
[How to Password Protect a PDF](https://apryse.com/blog/pdf-access-control-with-passwords) - 8/22/24
---
# Agent Instructions
This documentation is published with GitBook. GitBook is the documentation platform designed so that both humans and AI agents can read, navigate, and reason over technical content effectively. Learn more at gitbook.com.
## Querying This Documentation
If you need additional information that is not directly available in this page, you can query the documentation by asking a question.
Perform an HTTP GET request on the following URL with the `ask` and `goal` query parameters:
```
GET https://docs.apryse.com/web/security/security.md?ask=&goal=
```
`ask` is the immediate question: it should be specific, self-contained, and written in natural language.
`goal` is what the user is ultimately trying to achieve, the reason they need the answer. Sharing it helps GitBook give you a better, more relevant answer. A goal is most helpful when it describes the outcome the user wants rather than restating the question. For example, with `ask=how do I create an API token`, a goal like `automate deployments from our CI pipeline` lets GitBook tailor the answer to that use case.
The response will contain a direct answer to the question and relevant excerpts and sources from the documentation.
Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.