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SHA-1 Authentication Master

Dedicated IC Simplifies Implementation of a SHA-1 Based Token Authentication System

Product Details

Key Features

Simplified Block Diagram

Technical Docs

Data Sheet SHA-1 Authentication Master Aug 02, 2007

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Key Features

  • Initiates Challenge-and-Response Authentication based on the SHA-1 Algorithm
  • Dallas 1-Wire Master/Slave Interface Operates at Standard and Overdrive Speeds
  • Input and Output pins for Initiating Challenge and Reporting Authentication Pass/Fail
  • Programmable Configuration
  • Operates from 2.5V to 5.5V Supply
  • Tiny µMAX® Package (Pb-Free)

Applications/Uses

  • Cell Phones/Smartphones
  • Cradle and Accessory Chargers
  • Digital Cameras
  • Portable DVD and Media Players

Description

The DS2705 provides the master side of a Secure Hash Algorithm (SHA) based token authentication scheme. Hardware-based SHA authentication allows for security without the added cost and complexity of a microprocessor-based system. Batteries and other accessories are authenticated using a single contact through the Dallas 1-Wire® interface. Authentication is performed on demand or automatically, with the pass/fail status reported on open-drain output pins to signal the charge system and/or drive LEDs. The DS2705 stores a predetermined challenge-and-response pair in nonvolatile (NV) EEPROM. The DS2705 works in conjunction with Dallas Battery Management SHA-1 token products, including the DS2703 and DS2704.

Simplified Block Diagram

DS2705: Block Diagram DS2705: Block Diagram Zoom icon

Technical Docs

Data Sheet SHA-1 Authentication Master Aug 02, 2007

Support & Training

Search our knowledge base for answers to your technical questions.

Filtered Search

Our dedicated team of Applications Engineers are also available to answer your technical questions. Visit our support portal .