MAXREFDES43# by Analog Devices

DeepCover Secure Memory with I2C SHA-256 and 3Kb User EEPROM

Status: Active
Series: DS28C22
RoHS: Unknown
Download Datasheet Visit Manufacturer Site View Pricing & Stock
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 Memory (DS28C22) combines crypto-strong, bidirectional, secure challenge-and-response authentication and small message encryption functionality with an implementation based on the FIPS 180-specified Secure Hash Algorithm (SHA-256). A 3Kb user-programmable EEPROM array provides nonvolatile storage for 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 and unalterable 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 and encryption between a host system and slave-embedded DS28C22. Slave-to-host authentication is used by a host system to securely validate that an attached or embedded DS28C22 is authentic. Host-to-slave authentication is used to protect DS28C22 user memory from being modified by a nonauthentic host. The SHA-256 message authentication code (MAC), which the DS28C22 generates, is computed from data in the user memory, an on-chip secret, a host random challenge, and the 64-bit ROM ID. The device also facilitates encrypted read and write between host and slave using a one time pad computed by the SHA-256 engine. When not in use, the DS28C22 can be put in sleep mode where power consumption is minimal.

Where to Buy

Prices starting from US$30.93

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Newark Electronics
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element14
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Farnell
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Features

Symmetric Key-Based Bidirectional Secure Authentication and Encryption Model Based on SHA-256
Dedicated Hardware-Accelerated SHA Engine for Generating SHA-256 MACs
Strong Authentication with a 256-Bit, User-Programmable Secret, and Input Challenge
3072 Bits of User EEPROM Partitioned Into 12 Pages of 256 Bits
User-Programmable and Irreversible EEPROM Protection Modes Including Authentication, Write and Read Protect, Encryptions, and OTP/EPROM Emulation
Supports 100kHz and 400kHz I2C Communication Speeds
Supports Power-Saving Sleep Mode at 0.5µA (typ)
Operating Range: 3.3V ±10%, -40°C to +85°C
8-Pin TDFN Package

Specifications

Crypto Engine Symmetric
End Equipment IP ProtectionPCB ID and Authentication
Bus Type I2C
Memory Type EEPROM
Memory Size 3K x 1
Deep Cover Yes
Oper. Temp. (°C) -40 to +85
Package/Pins TDFN/8
BudgetaryPrice (See Notes) 1.21

Last 6 months Inventory & Pricing History

MAXREFDES43# Special Application Development Kits by Analog Devices

REF DESIGN BOARD AUTHENTICATION

Development Boards, Evaluation Tools
> Application Specific & Reference Design Kits
Status: Unknown
Series: -
RoHS: Unknown
Download Datasheet Visit Manufacturer Site View Pricing & Stock

Specifications

Silicon Manufacturer Maxim Integrated Products
Silicon Core Number DS28C22
Kit Application Type Crypto Authentication
Application Sub Type Embedded
Core Architecture -
Core Sub-Architecture -
Silicon Family Name -
Kit Contents Ref Design Board DS28C22
Product Range -
SVHC No SVHC (15-Jan-2018)
Features Secure Authentication Design with I2C SHA-256 Pmod Compatible Crypto-strong 3Kb User EEPROM

Last 6 months Inventory & Pricing History

Alternative Descriptions

Ref Design Board, Authentication | Newark Electronics
REF DESIGN BOARD, AUTHENTICATION | element14

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This part has not been flagged as RoHS Compliant.

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