Concurrent Playback Prevention

Notice

This document is a machine-translated draft and is currently undergoing review. Some content may be inaccurate or differ from the original Korean version. For the most precise information, refer to the Korean documentation.

• PlanEnterprise

Feature activation

Concurrent Playback Prevention is disabled by default. To activate this feature, refer to Concurrent Playback Prevention - Concurrent playback prevention policy and contact Technical Support (tech_support@kollus.com) or your Account Manager.

Concurrent playback prevention is a security feature that blocks unauthorized account sharing and protects copyright by preventing simultaneous viewing on multiple devices with a single account. Kollus VOD maps the customer's user ID (client_user_id) to the player ID (a unique device identifier) to verify the playback environment in real time, and provides features in the console to forcibly terminate suspicious sessions and reset registered devices.

The key operating mechanism is as follows.

• Device whitelist: Allows playback only on pre-authenticated devices.
• Session concurrency control: Limits the number of playback sessions that can be active at the same time.

Concurrent playback prevention policy

Kollus VOD offers four powerful security options tailored to your business model. Policy changes take effect in real time as soon as they are saved in the Kollus VOD console.

Policy	Description
Do not use	Concurrent playback is allowed on multiple devices without restriction.
One device at a time	Without any device registration process, playback is allowed only on the last device that attempted playback.
Concurrent playback on registered devices	Concurrent playback is freely allowed as long as the device is registered.
One registered device at a time	Playback is allowed on only one device among the registered devices.

⚠️ Prerequisites

• Device quantity policy: The number of devices that can play concurrently per account can be set up to 10 devices. If differentiated limits are needed depending on the operating environment (PC, mobile, etc.), separate consultation is available.
• Player compatibility (See also: Kollus Player types)
  • Kollus Web Player
  • Kollus HTML5 Player for PC
  • Kollus App Player

Set the number of allowed devices

In the Kollus VOD console, set the number of devices allowed per account from [Settings] > [Duplicate IDs] > [Registered device limit].

• Range: You can specify from a minimum of 1 up to a maximum of 10 devices per user ID.
• Integrated device management: PC, mobile, tablet, etc. are not distinguished and are managed collectively as a total count.
• Differentiated policy: If you want to specify individual limits by device type, such as '1 PC + 2 mobile devices', please contact Technical Support (tech_support@kollus.com) or your Account Manager.

Concurrent playback blocking management

Access the management page by clicking [Go to Duplicate IDs Management] under the [Settings] > [Duplicate IDs] menu in the Kollus VOD console.

View block history & register allowed devices

In the [Duplicate IDs] > [Prevention log] menu, you can perform the following actions:

• View block history: View duplicate playback block history from the past 3 months and download the data as a CSV file.
• Register allowed devices: Click [Register allowed device] in the blocked device list to permit playback on that device.

Deregister allowed devices

In the [Duplicate IDs] > [Device management] menu, click [Deregister] to remove previously allowed devices. If a user changes or loses a device, an administrator can deregister the existing device and guide the user to register a new one.

Monitor active sessions

In the [Duplicate IDs] > [Active sessions] menu, monitor information for all currently playing sessions in real time. If duplicate playback (such as unauthorized account sharing) is suspected on a specific account, click [End session] to immediately stop video playback and revoke access.

How to check the player ID

If you need to locate and deregister an existing device due to a user changing or losing their device, or if you need to identify a specific device in the block history to register it as an allowed device as an exception, instruct the user to check their Player ID via the paths below.

Operating system	Player ID location
Windows	System tray (bottom right) > right-click the KollusAgent icon > [Info]
macOS	Kollus App Player: While the player is running, press the [F5] key to display the ID in the player title Kollus HTML5 Player (agent-installed): [Settings (gear icon)] > [Player info (i icon)] at the bottom of the player
iOS	[Settings] > [Device info] in the Kollus Player app
Android	[Settings] > [Device info] in the Kollus Player app