The Maxim DS28E38 DeepCover Secure ECDSA Authenticator is the first secure authenticator to integrate Maxim ChipDNA's capabilities, protecting all data stored on the device from invasive discovery. ChipDNA technology employs a PUF (Powered Unlock Function) that enables the DS28E38 to offer cost-effective protection against invasive physical attacks. Attempts to probe or observe ChipDNA's operation alter the underlying circuitry, preventing the discovery of the unique value used by the chip's cryptographic functions.
With ChipDNA capability, the device provides a core set of integrated block-derived cryptographic tools, including an asymmetric hardware engine, a FIPS/NIST-compliant true random number generator, 2 Kbits of secure EEPROM, and a decrement-only counter. The device also offers a unique 64-bit ROM ID, which serves as a critical input parameter for cryptographic operations and acts as an electronic serial number within the application.
The DS28E38 communicates via the single-contact 1-Wire® bus at standard and overdrive speeds. Communication follows the 1-Wire protocol, with the ROM ID acting as the node address in a single-wire, multi-device network. The DS28E38 is compatible with the DS28E38 Evaluation System, which demonstrates the capabilities of five DS28E38 authenticators and five DS2476 DeepCover security coprocessors.
The secure ECDSA DS28E38 authenticator allows engineers to add an extra layer of protection to applications such as Internet of Things (IoT) nodes, device management, secure peripherals, and medical sensors.
