DS28E25 DeepCover Secure Authenticator with 1-Wire SHA-256 and 4Kb User EEPROM

Product Details

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 (DS28E25) combines secure challenge-and-response authentication functionality based on the FIPS 180-3-specified Secure Hash Algorithm (SHA-256) with 4Kb 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 DS28E25 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 pre-program device data including the SHA-256 secret. The DS28E25 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.

See parametric specs for Secure Authenticators

Key Features

Symmetric-Key-Based Bidirectional Secure Authentication Model Based on SHA-256
Sophisticated Die-Level Methods and Circuits for Tamper Protection of Sensitive Data and Signals
Dedicated Hardware-Accelerated SHA Engine for Generating SHA-256 MACs
Strong Authentication with a High Bit Count, User-Programmable Secret, and Input Challenge
4096 Bits of User EEPROM Partitioned Into 16 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: 3.3V ±10%, -40°C to +85°C
±8kV HBM ESD Protection (typ)
2-Pin SFN, 2-Pin TO-92, 6-Pin TDFN, and 6-Pin TSOC Packages

Applications/Uses

Identification and authentication of consumables
Reference Design License Management
Sensor/Accessory Authentication and Calibration
System Intellectual Property Protection

See parametric specs for Secure Authenticators

Parametric specs for Secure Authenticators

Crypto Engine	Symmetric
Applications	IP Protection Medical Consumable ID PCB ID and Authentication Print Cartridge Authentication Rack Card Security
Bus Type	1-Wire
Memory Type	EEPROM
Memory Size	4K x 1
Deep Cover	Yes
Oper. Temp. (°C)	-40 to +85
Package/Pins	SFN/2 TDFN/6 TO92/2 TO92/3 TSOC/6
Budgetary Price (See Notes)	$1.03 @1k

See parametric specs for Secure Authenticators

Simplified Block Diagram

DS28E25：標準アプリケーション回路

Technical Docs

Data Sheet	DeepCover Secure Authenticator with 1-Wire SHA-256 and 4Kb User EEPROM	Jan 29, 2013
App Note	Back to Basics: Secure Hash Algorithms
App Note	Wirelessly Powering and Accessing a 1-Wire Network
App Note	Implementing Secure Authentication Without Being a Cryptography Expert
App Note	Realizing Industry 4.0: Essential System Considerations
Sub-System Board	Alcatraz (MAXREFDES34#): SHA-256 Secure Authentication Design
App Note	Secure Your FPGA System Using a DeepCover Secure Authenticator
App Note	Introduction to SHA-256 Master/Slave Authentication
Tutorial	Hardware Security ICs Offer Large Security Returns at a Low Cost
App Note	The Fundamentals of a SHA-256 Master/Slave Authentication System
Tutorial	Industrial Systems Need the Added Protection of Security ICs
Tutorial	Uptime Protects the Bottom Line
App Note	Understanding the DS1WM Synthesizable 1-Wire Bus Master
Tutorial	How to Build a 1-Wire® Evaluation Kit
Tutorial	Easily Add Memory, Security, Monitoring, and Control to Medical Sensors and Consumables
App Note	Attachment Methods for the Electro-Mechanical 1-Wire Contact Package
App Note	Add Control, Memory, Security, and Mixed-Signal Functions with a Single Contact
App Note	Protect Your R&D Investment with Secure Authentication

Design & Development

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Additional Resources

Programming Options
Programming Secure Authenticators

Evaluation Board

DS28E25EVKIT

$89.25

Description

The DS28E25 evaluation system (EV system) provides the hardware and software necessary to evaluate and program the DS28E25 DeepCover^® Secure Authenticator. EV system operation requires a host PC for user-friendly evaluation.

This evaluation system includes a DS9400 USB-to-I²C PC adapter, a DS2465 EV board, a DS9120Q+ evaluation socket board for a TDFN DS28E25, and five DS28E25 sample devices in a TDFN package. The EV software runs on Windows^® 8, Windows 7, Windows Vista^®, and Windows XP^® operating systems. Detailed instructions for downloading and installing software, as well as general EV system operation are included in the EV system data sheet; software and documentation are available at the link above.

Note: The DS2465 EV board and DS9400# subcomponents are not available for direct sale outside of evaluation systems. A data sheet specific to DS9400# is not available.

View Details

Features

EV Kit Contains
- Five DS28E25 Devices in a TDFN-EP Package
- One USB-to-I²C PC Adapter (DS9400#) Provides PC Connection
- DS2465EVKIT# Evaluation Board Provides 1-Wire Interface and SHA-256 Coprocessor
- One EV Board (DS9120Q+) with TDFN-EP Socket Provides Easy Chip Evaluation
USB-to-I²C Module Contains Prolific PL-2303HXD USB-to-UART Chip
- Enumerates as a Virtual PC COM Port
- Windows-Certified Logo USB Device Driver Available
- Standard USB Cable Interface
EV Board Contains Convenient On-Board Test Points
Evaluation Software Will Be Provided Along with Full Evaluation Kit Data Sheet

SYSTEM BOARD

Alcatraz (MAXREFDES34#): SHA-256 Secure Authentication Design

Programming Options
Programming Secure Authenticators

SIMULATION MODELS

DS28E25 IBIS Model

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