DS28EL15 Datasheet | Maxim Integrated

ABRIDGED DATA SHEET Deep Cover Secure Authenticator with 1-Wire SHA-256 and 512-Bit User EEPROM General Description Deep Cover K 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) bines 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 municates over the single-contact 1-Wire M bus at overdrive speed. The munication follows the 1-Wire protocol with the ROM ID acting as node address in the case of a multidevice 1-Wire network. Applications Authentication of Consumables Secure Feature Control Ordering Information appears at end of data sheet. Features S Symmetric-Key-Based Bidirectional Secure Authentication Model Based on SHA-256 S Strong Authentication with a High-Bit-Count User Programmable Secret and Input Challenge S 512 Bits of User EEPROM Partitioned Into Two Pages of 256 Bits S User-Programmable and Irreversible...