About
Persistent File Protection (PFP) is a Virtru feature that allows organizations to select, protect and share a file with authorized recipients wherever the file goes. This persistent protection is achieved via the tdf.html file format. If you are reading this, it is likely because you are trying to access a tdf.html file someone sent you. This article will cover everything you need to know about accessing a tdf.html file.
Once you download and click to open a tdf.html file, it will open a web page and bring you to Virtru's Secure Reader. The Secure Reader will require you to quickly verify you are an authorized recipient and then display the file in your browser. This process is how the sender ensures that only authorized parties can view it no matter where the file goes or who it is shared with.
All tdf.html files are readable only through the Secure Reader. This means you are not able to download and modify the document and are restricted to viewing it in your browser with Virtru's Secure Reader.
Follow the steps below for a detailed walkthrough of how to access your secure file.
Please Note:
If your organization is a Virtru customer and you want to send PFP files, check out our Persistent File Protection (PFP) article that walks you through how to enable and send PFP files!
How to access and read your secure file
1. To start the process, open the tdf.html file you received/downloaded. If you received the file through a Virtru encrypted email, follow our instructions on reading and replying to a Virtru encrypted email, then click on the file once you access your secure email.
or 
2. After you open/View the file, a new tab will open in your browser. When prompted, select your email address.
If you don't see yours listed, click Use another email address and enter your information.
An important note about email aliases
Please be sure to verify using the exact email address to which the original secure file was sent. If the file was sent to an alias, group address, or distribution list address, you will need to select or enter that exact email address rather than your personal primary address.
If the file was not originally shared with you, you can follow the Request Access Workflow to request access from the file owner.
3. Choose how you'd like to verify your identity.
- Google & Office 365 users can use their pre-existing credentials to log into the Secure Reader directly (using Sign In with Google or Sign In with Microsoft). If you select this route, skip to step #5.
- Alternatively, users may choose Or sign-in with a one-time verification if they do not wish to authenticate via OAuth. A verification email will be sent you immediately after you select your email address.
4. Check your inbox for your verification email, coming from verify+xxxxxxxx@virtru.com (with each "x" being a digit). Open the verification email and click View Message to open your message.
Note:
Both the View Message link needs to be opened in the same browser on the same device as the file or email you are attempting to access in order to confirm your identity.
Please note, Virtru also offers a “cookie-less” verification pathway. If we detect that cookies and local storage have been disabled in the browser, we send a verification code via email. This code, once received, simply needs to be pasted into the proper field in the you browser in order to grant access. If you are having trouble entering all 8 digits, please check to make sure there is not a space in front of the code in the entry box.
If you do not receive the verification email, click here to troubleshoot.
5. Your secure file will open in the Virtru Secure Reader in your browser.
