What is a node-locked license?

Node-Locked License: Definition, How It Works, and When to Use It

What is Node-Locked Licensing?

Node-locked licensing is a widely used method for controlling software usage by tying a software license to a specific device—commonly referred to as a "node". This approach ensures that the licensed software can only be run on that particular device, which may be a computer, mobile device, or even an Internet of Things (IoT) device.

In this model, the license is paired with a unique hardware ID or "device fingerprint" that identifies the specific machine authorized to use the software. This makes node-locked licensing an effective way for software vendors to ensure only authorized, typically paying, customers can access and use their software.

Node-locked licenses are also known as single use, device, named host, machine-based, or anchored licenses.

How Node-Locked Licensing Works

• License Binding: During installation or activation, the software generates or requests a unique hardware identifier (such as a MAC address, CPU ID, or other device fingerprint).

• Activation: The license is activated and bound to this unique identifier, allowing the software to run only on that device.

• Enforcement: If the software is copied to another device, it will not run unless a new license is purchased or the license is officially transferred.

• Transferability: Some node-locked systems allow users to deactivate the license on one device and transfer it to another, but this is usually controlled and limited to prevent abuse.

Key Features and Benefits

Feature	Description
Security	Ties the license to a specific device, reducing unauthorized use and piracy.
Simplicity	Straightforward to implement and manage for single-user or single-device scenarios.
Flexibility	Can be combined with other models (e.g., perpetual, timed, or subscription-based licenses).
Offline Use	Once activated, node-locked licenses can often be used without a continuous internet connection.
Support	Unique device identifiers simplify troubleshooting and support.

Limitations and Considerations

• Lack of Portability: Node-locked licenses are not ideal for users who frequently switch devices or need to use the software across multiple machines.

• No Network Sharing: These licenses cannot be shared by multiple users on a network or used in environments like thin clients or remote desktops.

• Re-hosting: License transfer to a new device may require vendor approval or a formal deactivation process.

• Device Failure: If the licensed device fails, users may need to contact support to reactivate the license on a replacement device.

Node-Locked vs. Floating Licenses

Node-Locked License	Floating License
Tied to a single device	Shared across multiple devices/users
Ideal for dedicated users	Ideal for teams or networked users
No concurrent usage limits	Limits on simultaneous users
Simple management	Requires license server or management

When to Use Node-Locked Licensing

Node-locked licenses are best suited for:

• Single-user, single-device scenarios

• Environments where security and control are paramount

• Software used offline or in remote locations

• Applications where license sharing is not required

Implementation Tips

• Use secure device fingerprinting to prevent spoofing.

• Allow controlled license transfer or deactivation for user flexibility.

• Provide clear documentation and responsive support for license management.

• Consider combining with other models for broader customer needs.

Conclusion

Node-locked licensing is a robust and secure way to control software usage, ensuring only authorized devices can run the software. While it offers simplicity and strong protection against unauthorized use, it may not be suitable for every scenario—especially where flexibility and device sharing are needed. Vendors should weigh these factors when choosing a licensing model for their software products.