Retrofittable security for IoT devices: Rutronik introduces Swissbit's iShield HSM series

01/19/2023 Know-How

With the PU-50n iShield HSM series, Swissbit offers a reliable solution for storing security keys for identification, authentication, and registration of devices in the Internet of Things (IoT). The retrofittable plug-and-play USB hardware security module (HSM) closes security gaps that can occur with software-based storage of cryptographic keys. Manufacturers of connected devices, such as gateways or controllers, as well as system integrators for building and industrial automation, benefit from the "Made in Germany" security, the possibility to easily upgrade and update the security feature at any time and without complications. The Swissbit iShield HSM series is available at

iShield HSM stores the device's private key and certificate so securely that they cannot be disclosed or duplicated in software. The compact, rugged, high-quality USB key supports PKCS#11 and PKCS#15 public-key cryptography standards and is compatible with an open-source software stack (e.g., OpenSC).

A Secure Element (CC EAL6+) is embedded in the iShield HSM hardware using chip-on-board technology, making it tamper-proof and suitable for harsh operating environments.

Additional features

  • MLC NAND with Durabit feature
  • CC EAL 6+
  • RSA up to 2048 bit
  • ECC up to 384 bit


For more information about the iShield HSM series from Swissbit and a direct ordering option, please visit our e-commerce platform at

Contact Rutronik
Alex Neidhardt  |  Corporate Product Manager Boards & Storage  |  +49 7231 801 4415  |

The iShield HSM is a plug-and-play USB security anchor that allows existing AWS IoT Greengrass devices to be upgraded with a hardware security module.