Request a KDM
As an Operator or a Power Guest, request a KDM for a projector and follow it until a Manager approves it. As a Guest, download the KDMs sent to you.
- Projects
- Archive
- Roles
- OperatorPower GuestGuest
- Updated
A KDM (Key Delivery Message) unlocks an encrypted DCP on a specific projector for a specific time window. This guide is for Operators, Power Guests and Guests. Operators and Power Guests request a KDM, and a Manager approves it. Guests download the KDMs that someone sends them. If you are a Manager, read Deliver a KDM.
Video: https://www.youtube.com/embed/037EZR9I0nc?&wmode=opaque
Before you start
Your role in the Archive Project sets what you can do. Roles are set for each Project, so you can have a different role in another Project. To check your role, see Roles.
| What you can do | Operator | Power Guest | Guest |
|---|---|---|---|
| Request a KDM | Yes, a Manager approves | Yes, a Manager approves | No |
| Download KDM files | After approval | After approval | Only the KDMs sent to you |
| Approve a request or delete a delivery | No | No | No |
If you are a Guest, you do not see the KDM module until someone sends you a KDM delivery. Go to Download a KDM sent to you.
If you are an Operator or a Power Guest, make sure that these conditions are true before you request a KDM:
- The DCP is encrypted, and its DKDM is uploaded. Without a DKDM, the CPL does not appear in the wizard. Only a Manager can upload a DKDM: ask a Manager of the Project.
- You have the certificate of each target projector. A certificate is a DCI/SMPTE X.509 file (
.pem) that the cinema gives you. You can register it before you start, or during the wizard. - You know the recipient email. Mnemonica sends the KDM to this address after the approval.
Open the KDM module
From the Mnemonica main dashboard, click KDMs in the bottom navigation bar. The module has three tabs:
| Tab | Content |
|---|---|
| Active | Current deliveries: pending and approved |
| History | Completed and rejected deliveries |
| Devices | Your registered projector certificates |
Register a projector certificate
Open the Devices tab and click the add button (+) in the toolbar. The menu has two options:
- Upload Certificate: add a
.pemfile that the cinema sent you. - Browse Platform: import a certificate that is already registered on Mnemonica. Use this option when your organization manages certificates centrally.
Upload Certificate
Choose the option
Click Upload Certificate in the menu.
Name the device
Type a Device Name, for example "Main Theater Projector".
Add the file
Drop the .pem file into the upload area, or click the area to browse.
Upload
Click Upload.
Browse Platform
Choose the option
Click Browse Platform in the menu.
Select the certificate
Filter the list of platform certificates. Click a certificate to select it.
Name the device
Type a Device Name for your library.
Import
Click Import.
Click a row to open the Inspector panel with all the certificate details. To rename, replace or remove a certificate, click the options button (⋮) on its row.
Request a KDM
On the Active tab, click Create new KDM delivery. The wizard title is "Request KDM", because a Manager must approve your request.
Select the Project
Select the Project that contains the content. Use the search bar to filter by name. Only Projects with encrypted DCPs appear.
Select the CPL
Select the CPL (Composition Playlist), the version of the content to unlock. Each CPL can have a different language, subtitle track or audio configuration. Its tags show resolution, frame rate, audio format and aspect ratio.
Select the certificates
Select each projector that receives the KDM. You can select many certificates for one request. If a projector is not registered, open Upload Certificate and add its .pem file there.
Set the validity
Select a preset: 24 Hours, 1 Week, 2 Weeks or 1 Month. Or type custom dates in Valid From and Valid Until.
The KDM works only in this time window. After the Valid Until time, the projector cannot play the content.
Type the recipient
Type the recipient email. This step shows the Manager who reviews your request. As a Power Guest, you can also type a message for that Manager.
Review and submit
Read the summary in Content, Configuration and Delivery. To change a value, click Edit in that section. Click Submit Request.
Your request shows on the Active tab with the Pending status. The Manager receives a notification.
If you close the wizard after you type data, Mnemonica asks you to confirm: "Discard changes? All progress in this wizard will be lost."
Follow your request
Mnemonica notifies you when the Manager makes a decision. The Status column on the Active tab shows the result:
| Result | What it means | What to do |
|---|---|---|
| Pending | The Manager did not decide yet. | Wait. If it takes too long, ask the Manager to check the notification. |
| The Manager requested changes | The Manager sent the request back with a message. | Read the message. Edit the request and submit it again. |
| Approved | Mnemonica generated the KDM and notified the recipient. | Download the KDM files if you need them. |
| Rejected | The request is closed permanently. | Read the reason. To try again, create a new request. |
To download the KDM files of an approved delivery, click the options button (⋮) on its row, then click Download.
Completed and rejected requests move to the History tab, a read-only archive.
Download a KDM sent to you
When someone sends you a KDM delivery, Mnemonica notifies you, and the KDM module becomes available to you.
Open the KDM module
From the Mnemonica main dashboard, click KDMs in the bottom navigation bar.
Find the delivery
On the Active tab, find the delivery by its CPL name. Type in the search bar to filter the list.
Download
Click the options button (⋮) on the delivery row. Click Download.
Give the KDM files to the cinema. Each file works only on the projector it was created for, and only in its validity window.
Troubleshooting
"No CPLs found" in the wizard. The DCP is not encrypted, or its DKDM is not uploaded. Ask a Manager of the Project to upload the DKDM.
"No certificates uploaded yet". Register a certificate on the Devices tab, or upload one in the certificates step of the wizard.
A certificate shows "Expired". You can select it, but its KDMs do not work on the projector. Ask the cinema for a new certificate.
The request stays "Pending". Only a Manager can approve it. Ask the Manager to check the notification.
There is no Download option. You can download a KDM only after a Manager approves it.
You do not see the KDMs button. As a Guest, you see the KDM module only after someone sends you a KDM delivery. Otherwise, ask a Manager of the Project to check your role in the Project.
To learn more about DKDMs and the full KDM workflow, see Mnemonica DCP KDMs.
Related articles
Deliver a KDM
As a Manager, create a KDM delivery for one or more projectors, and approve or reject the KDM requests of your team.
Mnemonica DCP KDMs
Learn how DKDMs and KDM deliveries work in Mnemonica, who can do what, and where to download the Mnemonica distribution certificate.
Cinema delegates: download a DCP and its KDM
A distributor sent your cinema a film through Mnemonica. Register, install Mnemonica Gate, then download the DCP and the KDM for your projector.
Deliver a KDM
As a Manager, create a KDM delivery for one or more projectors, and approve or reject the KDM requests of your team.
Mnemonica Mobile App
The Mnemonica mobile app does everything the web app does, except downloading files. Learn which operating systems it needs and how it adds strong sign-in.