New lightweight PKI technologies help secure constrained IoT devices

As billions of devices are being connected to the internet of things, security is lagging behind. Especially for small and battery-powered devices with constrained computing resources. But new lightweight PKI technologies from research project CEBOT, SecureIoT and SecureCare, now enable true end-to-end security also for constrained devices.

Public key infrastructure (PKI) is state of the art when it comes to internet security. However, many small, battery-powered IoT devices lack the required computing resources to use traditional PKI protocols. Most current deployments with constrained devices are not secured at all or only by shared keys, PINs or passwords. As a result, there is a large risk of hacker attacks and eavesdropping.

Now, there is a breakthrough in solving this problem. New lightweight PKI technologies have been developed in the research projects to enable PKI for IoT devices. Martin Furuhed, Nexus’ PKI expert for more than 20 years, has participated in the project and co-authored a paper that addresses two challenges: secure enrollment and certificate overhead reduction.

“In this paper, we develop an automated certificate enrollment protocol light enough for highly constrained devices. This provides end-to-end security between certificate authorities (CA) and the recipient IoT devices. We also design a lightweight profile for X.509 digital certificates. Existing CAs can now issue traditional X.509 certificates to IoT devices,” says Shahid Raza, Director of Cybersecurity at RISE Research Institutes of Sweden. Read the paper here: PKI4IoT: Towards Public Key Infrastructure for the Internet of Things.