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 (DS28E15) combines secure challenge and response authentication functionality based on the FIPS180-3 specified Secure Hash Algorithm (SHA-256) with 512 bits 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 DS28E15 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 preprogram device data including the SHA-256 secret. The DS28E15 communicates over Maxim's single-contact 1-Wire® bus.
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: 3.3V ±10%, -40°C to +85°C
±8kV HBM ESD Protection (typ)
2-Pin SFN, 6-Pin TDFN-EP, and 6-Pin TSOC Packages
Applications/Uses
Authentication of Consumables
Secure Feature Control
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