Millions of connected cars are already on the road, and industry analysts predict there will be more than 250 million by 2020. Unfortunately, all this connectivity builds a real surface of attack for hackers. Automotive groups are addressing security measures to support growth in valuable markets for connected services such as content streaming, location-based assistance etc while preventing hackers exploiting the connections for their own ends.
STMicroelectronics in order to help the industry meet these challenges is combining its expertise in security chips. It’s new Telemaco 3P telematics and connectivity processors (STA1385 and its variants) integrate a powerful, dedicated, isolated Hardware Security Module (HSM), which acts like an independent security guard to watch data exchanges and encrypt and authenticate messages. The HSM securely checks the authenticity of received messages and any external devices that try to connect and protects against eavesdropping.
With this HSM on-chip, Telemaco3P devices are ahead of the general-purpose application processors typically found in current connected-car systems, which lack dedicated hardware-based security. ST’s new chips are also extremely robust, with a 105°C maximum temperature rating for use in locations that can become extremely hot, such as on top or directly beneath the roof in a smart antenna.
The new automotive processors are part of a comprehensive ST strategy to offer products with embedded security functions that include stand-alone Secure Elements (ST33) and embedded Flash microcontrollers (SPC5). In addition to implementing state-of-the-art security techniques, including symmetric and asymmetric cryptography, the HSM also runs software-security algorithms, giving extra freedom for the main high-performance CPU to host more sophisticated applications.
Integrated CAN FD (Controller Area Network with Flexible Data rate), Gigabit Ethernet, and 100Mbit/s Secure Digital I/O (SDIO) interfaces allow the Telemaco3P Family to be used as communication gateways throughout the vehicle, for linking infotainment systems, or Electronic Control Units (ECUs) connected to the CAN bus like door controllers, engine or transmission management systems, or body electronics. Essential power-management circuitry is also integrated, which simplifies design, aids miniaturization, and saves bill-of-materials costs.
The STA1385 is designed to comply with the automotive functional-safety standard ISO 26261, up to safety integrity level B (ASIL-B)*, and meet the AUTOSAR** specification for protected communication across the CAN bus. Telemaco3P devices can run POSIX***-compliant operating systems, giving users flexibility to choose the optimum OS for a variety of intended use cases.
*ASIL-B- Automotive Safety Integrity Level
**AUTOSAR: AUTomotive Open System ARchitecture
*** The Portable Operating System Interface (POSIX) is a family of standards specified by the IEEE Computer Society