DeepCover Secure Authenticator with 1-Wire SHA-256 and 512-Bit User EEPROM

Description

Create a design and simulate using EE-Sim^® tools:

DeepCover^® embedded security solutions cloak sensitive data under multiple layers of advanced physical security to provide the industry's most secure key storage possible. The Deepcover Secure Authenticator (DS28EL15) combines crypto-strong bidirectional secure challenge-and-response authentication functionality with an implementation based on the FIPS 180-3-specified Secure Hash Algorithm (SHA-256). A 512-bit userprogrammable EEPROM array provides nonvolatile storage of application data. Additional protected memory holds a read-protected secret for SHA-256 operations and settings for memory protection control. Each device has its own guaranteed unique 64-bit ROM identification number (ROM ID) that is factory programmed into the chip. This unique ROM ID is used as a fundamental input parameter for cryptographic operations and also serves as an electronic serial number within the application. A bidirectional security model enables two-way authentication between a host system and slave-embedded DS28EL15. Slave-to-host authentication is used by a host system to securely validate that an attached or embedded DS28EL15 is authentic. Host-to-slave authentication is used to protect DS28EL15 user memory from being modified by a nonauthentic host. The DS28EL15 communicates over the single-contact 1-Wire^® bus at overdrive speed. The communication follows the 1-Wire protocol with the ROM ID acting as node address in the case of a multidevice 1-Wire network.

Key Features

• Symmetric-Key-Based Bidirectional Secure Authentication Model Based on SHA-256
• Strong Authentication with a High-Bit-Count User-Programmable Secret and Input Challenge
• 512 Bits of User EEPROM Partitioned Into Two 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
• Operating Range: 1.8V ±5%, -40°C to +85°C
• ±8kV HBM ESD Protection (typ)
• 6-Pin TDFN-EP Package

Applications/Uses

• Identification and authentication of consumables
• Reference Design License Management
• Sensor/Accessory Authentication and Calibration
• System Intellectual Property Protection