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

Protect Your Development Investment with Crypto-Strong Authentication and Advanced Physical Security

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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 DS28E15 generates the SHA-256 message authentication code (MAC) 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.

Our Secure Drug Delivery video shows how Maxim security products can be used to authenticate remote drug delivery.
DS28E15: Typical Application Circuit DS28E15: Typical Application Circuit Enlarge+

Key Features

  • 512-Bit EEPROM with SHA-256 Authentication for Reads and Writes
    • 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
  • Minimalist 1-Wire Interface Lowers Cost and Interface Complexity
    • Reduces Control, Address, Data, Power, and Programming Signals to a Single Data Pin
    • ±8kV HBM ESD Protection (typ)
    • 2-Pin SFN, 6-Pin TDFN-EP, and 6-Pin TSOC Packages
    • Operating Range: 3.3V ±10%, -40°C to +85°C


  • Authentication of Consumables
  • Secure Feature Control
Part NumberCrypto EngineApplicationsMemory TypeMemory SizeBus TypeVSUPPLY
Deep CoverOper. Temp.
See Notes
DS28E15 Symmetric
IP Protection
Medical Consumable ID
PCB ID and Authentication
Print Cartridge Authentication
EEPROM512 bits1-Wire2.97 to 3.63Yes-40 to +85
$0.70 @1k
See All Secure Authenticators (31)
Pricing Notes:
This pricing is BUDGETARY, for comparing similar parts. Prices are in U.S. dollars and subject to change. Quantity pricing may vary substantially and international prices may differ due to local duties, taxes, fees, and exchange rates. For volume-specific and version-specific prices and delivery, please see the price and availability page or contact an authorized distributor.

DS28E15EVKIT: Evaluation System for the DS28E15 and DS2465

Technical Documents

App Note 7015 Back to Basics: Secure Hash Algorithms
App Note 6755 Wirelessly Powering and Accessing a 1-Wire Network
App Note 6391 Implementing Secure Authentication Without Being a Cryptography Expert
User Guide 6296 MAXREFDES143# Quick Start Guide
App Note 5991 Realizing Industry 4.0: Essential System Considerations
App Note 5940 Secure 3D Printing - the New Disruptive Technology - and Watch the Market Grow
App Note 5931 Device Authentication Thwarts Counterfeiting
Sub-System Board 5822 Alcatraz (MAXREFDES34#): SHA-256 Secure Authentication Design
App Note 5803 Secure Your FPGA System Using a DeepCover Secure Authenticator
App Note 5779 Introduction to SHA-256 Master/Slave Authentication
Tutorial 5716 Hardware Security ICs Offer Large Security Returns at a Low Cost
App Note 5546 The Fundamentals of a SHA-256 Master/Slave Authentication System
Tutorial 5522 Industrial Systems Need the Added Protection of Security ICs
Tutorial 5518 Uptime Protects the Bottom Line
App Note 5507 Understanding the DS1WM Synthesizable 1-Wire Bus Master
Tutorial 4702 Easily Add Memory, Security, Monitoring, and Control to Medical Sensors and Consumables
App Note 4132 Attachment Methods for the Electro-Mechanical 1-Wire Contact Package
App Note 3989 Add Control, Memory, Security, and Mixed-Signal Functions with a Single Contact
App Note 3675 Protect Your R&D Investment with Secure Authentication

Quality and Environmental Data

Product Reliability Reports: DS28E15.pdf 
Lead-Free Package Tin (Sn) Whisker Reports

Additional Resources

Programming Options
Programming Secure Authenticators
Device   Fab Process   Technology   Sample size   Rejects   FIT at 25°C   FIT at 55°C  

Note : The failure rates are summarized by technology and mapped to the associated material part numbers. The failure rates are highly dependent on the number of units tested.

Quality Management System >
Environmental Management System >


Related Resources

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  • Robust Countermeasures Protect Against Security Attacks
  • Efficient Secure Hash Algorithm Authenticates Peripherals
  • Supplemental Features Enable Easy Integration into End Applications

DeepCover I2C Secure SHA-3 Authenticator with ChipDNA PUF Protection

  • Robust Countermeasures Protect Against Security Attacks
  • Efficient Secure Hash Algorithm Authenticates Peripherals
  • Supplemental Features Enable Easy Integration into End Applications