Authenticator chip guarantees origin of electronic car components
Designers of electronic automotive systems can now enhance safety, security and data integrity for connected vehicle systems while also reducing both complexity and code development time by authenticating genuine components with the DS28E40 DeepCover automotive secure authenticator from Maxim. The DS28E40 is a parasitically-powered authenticator utilizing its 1-Wire interface for connectivity. The IC promises to reduce the software vulnerability to ensure only genuine components are used for many electronic systems, such as advanced driver assistance systems (ADAS) and electric vehicle batteries.
Today, automotive manufacturers use authentication in two ways: to ensure only OEM-certified components are safely connected to vehicle systems and to reduce the growing threat of malware attacks. However, most full-blown secure microcontrollers have a relatively big footprint and require software development teams to create, rigorously test and debug their code. Here are the problems with current microcontroller-based solutions: The bigger the code base is, the higher the risk of bugs or malware adversely affecting performance. Plus, I²C and SPI interface automotive security solutions available on the market may require many interface pins—as many as five or six, including dedicated power and reset lines. More pins can lead to higher costs and more reliability issues.
The DS28E40 DeepCover authenticator is a fixed-function, 1-Wire solution that meets the AEC-Q100 standard Grade 1 performance standards and replaces microcontroller-based approaches. The fixed-function device gives OEMs a targeted algorithm and command toolset to meet their specific security needs, while reducing both system design complexity and associated code development efforts. Its public/private key asymmetric ECDSA (ECC-P256 curve) and other key authentication algorithms are built into the IC, allowing OEMs to skip development of proprietary device-level code. This and other algorithms in the authenticator IC provide a strong defense against unauthorized components that could compromise performance, safety and data integrity.
The 1-Wire interface combines power and communication on a single pin and thus requires only two interconnects including the ground pin. Fewer interconnect pins reduce cost and further improves reliability by enabling smaller cable harnesses to connect an ECU to a remote endpoint. The DS28E40 comes in a compact, 4mm-x-3mm TDFN package and operates over the -40°C +125°C temperature range.
More information: https://maxim.click/DS28E40_Product
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