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DS28E25：DeepCover Secure Authenticator with 1-Wire SHA-256 and 4Kb User EEPROM

Protect Your Development Investment with Crypto-Strong Authentication and Advanced Physical Security

DeepCover® embedded security solutions cloak sensitive data under multiple layers of advanced physical security to provide the most secure key storage possible. The DeepCover Secure Authenticator (DS28E25) combines secure challenge-and-response authentication functionality based on the FIPS 180-3-specified Secure Hash Algorithm (SHA-256) with 4Kb of user-programmable EEPROM. Additional secure memory holds a secret/key for SHA-256 operations. Each device has its own guaranteed unique 64-bit ROM identification number (ROM ID) that is factory programmed into the chip. The SHA-256 message authentication code (MAC), which the DS28E25 generates, is computed from data in the user memory, the SHA-256 secret, a host controller random challenge, and the 64-bit ROM ID. A secure and low-cost factory-programming service is available to pre-program device data including the SHA-256 secret. The DS28E25 communicates over Maxim's single-contact 1-Wire® bus. Our Secure Drug Delivery video shows how Maxim security products can be used to authenticate remote drug delivery.

Key Features Symmetric-Key-Based Bidirectional Secure Authentication Model Based on SHA-256 Sophisticated Die-Level Methods and Circuits for Tamper Protection of Sensitive Data and Signals Dedicated Hardware-Accelerated SHA Engine for Generating SHA-256 MACs Strong Authentication with a High Bit Count, User-Programmable Secret, and Input Challenge 4096 Bits of User EEPROM Partitioned Into 16 Pages of 256 Bits User-Programmable and Irreversible EEPROM Protection Modes Including Authentication, Write and Read Protect, and OTP/EPROM Emulation Unique, Factory-Programmed 64-Bit Identification Number Single-Contact 1-Wire Interface Communicates with Host at Up to 76.9kbps Operating Range: 3.3V ±10%, -40°C to +85°C ±8kV HBM ESD Protection (typ) 2-Pin SFN, 2-Pin TO-92, 6-Pin TDFN, and 6-Pin TSOC Packages

DS28E25: Typical Application Circuit Applications/Uses Identification and authentication of consumables Reference Design License Management Sensor/Accessory Authentication and Calibration System Intellectual Property Protection

DataSheet

Parametrics

Design kits & evaluation modules

• DS28E25EVKIT

Quality and Environmental Data

• DS28E25.pdf

Ordering Information