Infineon — OPTIGA™ TPM SLM 9670 Trusted Platform Module

Infineon OPTIGA™ TPM SLM 9670 Trusted Platform Module

Dedicated industrial security chip protects smart factory data communications

The OPTIGA™ TPM SLM 9670 from Infineon is a Trusted Platform Module (TPM) which offers features specifically aimed at the requirements of industrial applications.


The SLM 9670 protects the integrity and identity of industrial PCs, servers, industrial controllers, or edge gateways. It controls access to sensitive data in important positions in a connected, automated factory or other industrial setting, as well as at the interface to the cloud.


The SLM 9670 offers designers the high levels of flexibility needed to address innovative use cases in smart factories and Industry 4.0 while safeguarding system security. It enables:

    • Strong digital device ID and device authentication
    • Secured communication for data confidentiality and IP protection
    • Protection of the integrity of devices and software, including of software updates


The TPM acts as a vault for sensitive data in connected devices, and lowers the risk of data and production losses due to cyber attacks. The benefit to designers is not limited to security, as TPMs also help to shorten time-to-market and reduce costs in industrial applications.


Through the use of the certified SLM 9670, manufacturers of industrial devices can comply with the requirements for hardware-based security of the higher levels of IEC 62443, a series of international standards which defines the cybersecurity requirements for industrial automation and control systems.


Use of a discrete TPM such as the SLM 9670 reduces engineering and support costs. Custom-built security is expensive and requires constant maintenance. With the SLM 9670, OEMs can rely on Infineon’s decades of security expertise and the large team of specialist engineers which continues to develop enhancements for it. TPMs can also help to reduce maintenance cost and effort by supporting remote maintenance and software update features in industrial devices.


The OPTIGA TPM SLM 9670 fully complies with the TPM 2.0 standard of the Trusted Computing Group, and is certified by an independent test laboratory in accordance with the Common Criteria standard for computer security certification, thus demonstrating a proven level of security.


Offering a service life of 20 years and on-chip support for firmware updates, the TPM handles the long-term security risks which might be encountered in an industrial environment.


  • Asymmetric cryptography capabilities:
    • ECC
    • ECC BN-256
    • ECC NIST P-256
    • RSA1024
    • RSA2048
  • Security certificates:
    • CC EAL4+ (Moderate)
    • FIPS 140-2 level 2
  • Symmetric cryptography capabilities
    • HMAC
    • SHA-1
    • SHA-256
    • AES
  • Qualified to JEDEC JESD47 industrial standard
  • 6,962 bytes free non-volatile memory
  • Key storage:
    • Up to three keys in volatile memory
    • Up to seven keys in non-volatile memory
    • Up to eight non-volatile memory counters
  • Operating-temperature range: -40 °C to 105 °C


  • Industrial systems
  • Smart factories
  • Industrial communications equipment
  • Programmable logic controllers
  • Industrial PCs

Evaluation Board


The OPTIGA™ TPM Evaluation Kit is convenient, providing everything the developer requires in one package, including a Quick Start Guide for easy and fast set-up. The kit consists of an Iridium board featuring the SLM 9670 and a header compatible with Raspberry Pi, and a Raspberry Pi 3 board with 8 Gbyte SD card.

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