January 19, 2023

What is Dynamic Device Key Generation?

The world of technology is constantly evolving and with its security measures must evolve as well. One such security system is Dynamic Device Key Generation, (aka DDKG). DDKG is the process of creating an encryption key on a hardware device that changes every time the device is used.

It’s designed to be extremely secure and virtually impossible for hackers or attackers to exploit. In this blog post, we will explore what DDKG is, how it works, and why it’s important for businesses and consumers alike.

We will also look at how companies are implementing this technology in their own business operations and discuss best practices for using DDKG.


What is DDKG?

Dynamic Device Key Generation is a security measure used to protect IoT devices and data. Through DDKG, IoT devices can securely identify themselves to the server. It works by generating a unique key for each device that is used to encrypt and decrypt data.

Certificates have become a better solution than passwords, as they can be revoked and managed, as well as hold information about their chain of trust. This means that if one device is lost or stolen, the data on it cannot be accessed by anyone who does not have the key. This makes it much more difficult for hackers to get access to sensitive information.

How does DDKG work?

DDKG is a security protocol that uses a device’s unique hardware characteristics to generate a safe and secure key. This key is then used to encrypt data on the device, making it difficult for attackers to access the device or encrypted data.

DDKG works by first generating a random number on the device. This number is then combined with information about the device, such as its serial number and manufacturing date. This combination of numbers is fed into an algorithm which generates a unique key. This key is then used to encrypt data on the device.

DDKG is a strong security protocol because it is very difficult for attackers to replicate a device’s hardware characteristics. Even if an attacker was able to gain access to a device, they would not be able to generate the same key and decrypt the data.

The Benefits of DDKG

Dynamic Device Key Generation (DDKG) is a security feature that generates a unique key for each individual device. This means that even if one device is compromised, the keys for other devices remain secure. DDKG also makes it possible to revoke access for a specific device without affecting the security of other devices.

DDKG is also a better solution for the IoT as setting individual passwords for the number of devices in the IoT becomes almost impossible. With DDKG the device does most of the authentication work.

DDKG is also a good solution due for access management, as the unique keys only allow access from the correct IoT devices. As the access is self-generated from the device, it establishes security across the network, as the devices secure their own integrity preventing cloning and spoofing attacks.

The Challenges of DDKG

Dynamic Device Key Generation (DDKG) is a relatively new concept in the world of cryptography and security. It addresses the problems associated with the use of static keys, which can be compromised if they are not properly managed. DDKG offers a more robust and secure solution by generating keys dynamically, making it much more difficult for an attacker to compromise the system.

However, DDKG comes with its own set of challenges. One major challenge is that it requires all devices in a system to be able to generate and exchange keys securely. This can be a difficult task, particularly in systems with many devices.

Another challenge is that DDKG can introduce latency into a system, as each device must generate its own key before it can communicate with other devices. This can be an issue in real-time systems where low latency is critical.

How to Implement DDKG: Encryption keys

To take advantage of DDKG, device manufacturers need to first generate a unique, unchangeable key for each device during the manufacturing process. This key can be generated using a variety of methods, but it must be impossible to change or duplicate. Once this key is generated, it needs to be securely stored on the device.

When a user wants to activate a new device, they will need to generate a new key pair using the manufacturer’s key as part of the process. This new key pair will be used to encrypt and decrypt data on the device. The private key should never leave the device, and the public key can be shared with anyone who needs to send data to the device.

In order to ensure that only authorized devices can access data, servers or services that store or transmit data should keep a list of approved public keys. When new data is being sent, the sender should encrypt it using one of the approved public keys. This way, even if an unauthorised device manages to get hold of the data, they won’t be able to read it without also having access to the corresponding private key.


Dynamic Device Key Generation, or DDKG, is a secure method for generating device keys that can be used to authenticate devices. Not only does DDKG provide robust security protocols, but it also helps organizations easily manage the key distribution process for their various devices.

With its ability to generate unique device keys on demand and quickly provision them over an API connection, DDKG provides organizations with an efficient and cost-effective way of protecting their data from unauthorised access.

Louise José