Infineon rolls cyber security module for connected cars

Infineon rolls cyber security module for connected cars

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By Christoph Hammerschmidt

The Optiga TPM 2.0, Infineon’s automotive TPM, protects the communication between the manufacturer and the “computer on four wheels”. It is a hardware-based security solution that has proven itself in computer security. Car manufacturers can now also insert sensitive security keys for assigning access rights, authentication and data encryption. In addition, the TPM can be updated to keep the security level up to date throughout the life of the vehicle.

The mobility of the future requires the exchange of enormous amounts of data. Cars send real-time traffic information to the cloud or receive updates “Over The Air” from the car manufacturer in order to update software quickly and cost-effectively. The sender and receiver of this data authenticate themselves on both sides using cryptographic keys. In Optiga TPM, this sensitive information, comparable to a safe, is particularly protected against logical and physical attacks.

Cars increasingly need to communicate, and their digital communication
needs protection. Infineons TPM securely stores the keys.

For automobile manufacturers, the insertion of the initial key into the vehicle is a particularly sensitive moment. If the TPM is used, this step can take place in Infineon’s certified semiconductor manufacturing environment; the chip is produced in Germany and the Philippines. The keys are then protected against unauthorized access; special security precautions along the various stages of the value chain, which is often distributed worldwide, are no longer required.

The TPM also generates, stores and manages additional security keys for communication within the vehicle. The TPM is also used to detect faulty or manipulated software and components in the vehicle and, in such cases, to initiate troubleshooting on the part of the manufacturer.

Safety functions and algorithms evolve over the course of a vehicle’s life, which today lasts an average of 12-15 years. The firmware of the TPM can be updated remotely and can therefore always be kept up to date with the latest security technology – including the cryptographic mechanisms (cryptoagility).

The Optiga TPM 2.0 SLI 9670 from Infineon is a plug-and-play solution for automotive applications. It is particularly suitable for use in a central gateway, the telematics unit or in the vehicle’s infotainment system.

The SLI 9670 consists of an attack-resistant security chip and a powerful firmware developed according to the latest security standards. With the help of the firmware, the user can immediately use security functions such as encryption and decryption, signature and verification. Together with the open source software stack (TSS Stack) for the host processor also provided by Infineon, the TPM can be integrated into the system. It has an SPI interface and the advanced encryption algorithms RSA-2048, ECC-256 and SHA-256.

The new TPM complies with the internationally recognized standard of the Trusted Computing Group TPM 2.0, is security-certified according to Common Criteria and qualified according to the automotive standard AEC-Q100. Some car manufacturers have already decided to use the Optiga TPM, says Infineon. However, the chip manufacturer does not reveal which these are.

Further information is available at

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