1-Wire ECDSA Secure Authenticator

The DS28E30 provides a highly secure and easily deployed turnkey authentication solution based on the FIPS-186 ECDSA standard. The secure authenticator combines ECDSA challenge and response authentication with secured EEPROM for the storage of the keys and user data.

The device provides a core set of cryptographic tools derived from integrated blocks including an asymmetric hardware engine, a true random number generator (TRNG), 3Kb of secure EEPROM, a decrement-only counter, and a unique 64-bit ROM identification number (ROM ID). The ECC public/private key capabilities operate from the NIST-defined P-256 curve to provide a FIPS 186-compliant ECDSA signature generation function to support a bidirectional asymmetric key authentication model. The unique ROM ID is used as a fundamental input parameter for cryptographic operations and serves as an electronic serial number within the application. In addition, authenticity of the chip can be verified with a Maxim-provided public key certificate. The device communicates over the single-contact 1-Wire® bus at overdrive speed. The communication follows the 1-Wire protocol with the ROM ID acting as a node address in the case of a multidevice 1-Wire network.

Applications

* Accessory and Peripheral Secure Authentication * Battery Authentication and Charge Cycle Tracking * Medical Tools/Accessories Authentication and Calibration

* Robust Countermeasures Protect Against Security Attacks

* All Stored Data Cryptographically Protected from Discovery

* ECC P-256 Secure Compute Engine

* Preprogrammed and Write-Protected ECC P-256 Key Pair * FIPS 186-4 Compliant ECDSA for Strong Challenge/Response Authentication * ECDSA Authenticated R/W of Configurable Memory

* TRNG Used for Secure ECDSA Nonces * Supplemental Features Enable Easy Integration into End Applications

* 17-Bit, One-Time Settable, Nonvolatile Decrement-Only Counter with Authenticated Read * 3Kb of Secure EEPROM for User Data, Keys, Certificate, and Secure Counter* Unique and Unalterable Factory-Programmed, 64-Bit Identification Number (ROM ID) * Authenticity Verification with ECDSA Using Preprogrammed Maxim Certificate * Advanced 1-Wire Protocol Minimizes Interface to Single Contact * Full-Time Overdrive Communication Speed * Operating Range: -40°C to +85°C, 1.62V to 5V * 4-Bump WLP and 6-Pin TSOC Packages * 3.5μA (typ) Input Load Current * High ESD Immunity of 1-Wire Pin: ±8kV Human Body Model (HBM), typ