DS28EL22:DeepCover Secure Authenticator with 1-Wire SHA-256 and 2Kb 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 (DS28EL22) 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 2Kb 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 DS28EL22. Slave-to-host authentication is used by a host system to securely validate that an attached or embedded DS28EL22 is authentic. Host-to-slave authentication is used to protect DS28EL22 user memory from being modified by a nonauthentic host. The SHA-256 message authentication code (MAC), which the DS28EL22 generates, is computed from data in the user memory, an on-chip secret, a host random challenge, and the 64-bit ROM ID. The DS28EL22 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. 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
  • Dedicated Hardware-Accelerated SHA Engine for Generating SHA-256 MACs
  • Strong Authentication with a High Bit Count, User-Programmable Secret, and Input Challenge
  • 2048 Bits of User EEPROM Partitioned Into 8 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: 1.8V ±5%, -40°C to +85°C
  • Low-Power 5µA (typ) Standby
  • ±8kV Human Body Model ESD Protection (typ)
  • 6-Pin TDFN Package
Applications/Uses
  • Authentication of Network-Attached Appliances
  • Key Generation and Exchange for Cryptographic Systems
  • Printer Cartridge ID/Authentication
  • Reference Design License Management
  • Secure Feature Setting for Configurable Systems
  • Sensor/Accessory Authentication and Calibration
  • System Intellectual Property Protection
DataSheet
titleDownload file
DS28EL22 Data SheetDS28EL22.pdf
Parametrics
Part NumberApplicationsMemory TypeMemory SizeBus TypeVSUPPLY
(V)
Deep CoverOper. Temp.
(°C)
Package/PinsBudgetary
Price
See Notes
DS28EL22IP Protection
Medical Consumable ID
PCB ID and Authentication
Print Cartridge Authentication
EEPROM2K x 11-Wire1.71 to 1.89Yes-40 to +85TDFN-EP/6$1.15 @1k
Design kits & evaluation modules
Quality and Environmental Data
Ordering Information
Part NumberStatusRecommended ReplacementPackageTempRoHS
DS28EL22Q+TActiveTDFN-EP,;6 pin;9.6 mm²-40°C to +85°CLead Free
DS28EL22Q+UActiveTDFN-EP,;6 pin;9.6 mm²-40°C to +85°CLead Free
DS28EL22.pdf DS28EL22
DS28EL22.pdf DS28EL22
DS28EL22.pdf DS28EL22
Alcatraz (MAXREFDES34#): SHA-256 Secure Authentication Design DS28EL25
Secure Your FPGA System Using a DeepCover Secure Authenticator DS28EL25
Introduction to SHA-256 Master/Slave Authentication DS24L65
Hardware Security ICs Offer Large Security Returns at a Low Cost DS24L65
Industrial Systems Need the Added Protection of Security ICs MAXQ1050
Uptime Protects the Bottom Line DS24L65
Understanding the DS1WM Synthesizable 1-Wire Bus Master DS1923
Easily Add Memory, Security, Monitoring, and Control to Medical Sensors and Consumables DS24L65
DS28EL22.pdf DS28EL22