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Mofumi PDF

Certificate Encryption

Coming soon

Encrypt a PDF for specific people using their public certificates — no shared password needed.

100% Private — files never leave your device

Coming soon

This tool is on our roadmap. It needs a heavy engine that we're still bringing to the browser.

About this tool

Certificate Encryption will protect a PDF with public-key security (Adobe.PubSec): instead of a password, the file can only be opened by people who hold the private key for one of the certificates you choose. It is ideal inside organisations that already issue certificates to staff.

Each recipient’s certificate wraps the document key separately, so you can add or remove readers without sharing any secret. The document itself is encrypted with AES-256.

This tool is coming soon. Until then, use Protect PDF with a strong password and send the password through a different channel.

Engines: forge · pdf-lib

How to use

  1. 1

    Upload the PDF to protect.

  2. 2

    Add the recipients’ certificates (.cer, .crt or .pem).

  3. 3

    Encrypt and send the file — only those recipients can open it.

Use cases

  • Internal confidential mail

    Send documents that only named employees can open with their smart card or certificate.

  • Government correspondence

    Exchange protected files between agencies that use PKI.

  • No password sharing

    Avoid sending passwords over chat or email.

Frequently asked questions

When will it be available?

It is planned for a later release. Protect PDF is available today.

Which readers support certificate encryption?

Adobe Acrobat and Reader support it; many simple viewers do not.

Will my certificates be uploaded?

No. Like every Mofumi PDF tool, it will run entirely in your browser.

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