Maxim DS28E22Q+T

Микросхема аутентификацииАутентификация, безопасность6-WDFN Открытая колодка

Overview

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 (DS28EL25) 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 4Kb user-programmable EEPROM array provides nonvolatile storage of application data and additional protected memory holds a read-protected secret for SHA-256 operations and settings for user memory 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 DS28EL25. Slave-to-host authentication is used by a host system to securely validate that an attached or embedded DS28EL25 is authentic. Host-to-slave authentication is used to protect DS28EL25 user memory from being modified by a nonauthentic host. The SHA-256 message authentication code (MAC), which the DS28EL25 generates, is computed from data in the user memory, an on-chip secret, a host random challenge, and the 64-bit ROM ID. The DS28EL25 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 multiple-device 1-Wire network.

Features

Applications

• Ecosystem Control
• Anti-cloning
• Message Security
• µP Switch Interfacing
• Industrial Instruments
• PC-Based Instruments
• Portable Instruments
• Membrane Keypads
• Authentication of Medical Sensors and Tools
• Secure Management of Limited Use Consumables