AT88SA102S Datasheet, PDF (1/24 Pages) ATMEL Corporation – CryptoAuthentication

Features
• Secure authentication & key exchange
• Superior SHA-256 Hash Algorithm
• Best in class 256 bit key length
• Guaranteed Unique 48 bit Serial Number
• High speed single wire interface
• Supply Voltage: 2.5 – 5.5V
• 1.8 – 5.5 V Communications
• <100nA Sleep Current
• 4KV ESD protection
• Multi-level hardware security
• Secure personalization
• Green compliant (exceeds RoHS) 3 pin SOT-23 package
Applications
• Authentication of Replaceable Items
• Software anti-piracy
• Network & Computer Access control
• Portable Media Player & GPS System
• Key exchange for encrypted downloads
• Prevention of clones for demo and eval boards
• Authenticated communications for control networks
• Anti-clone authentication for daughter cards
• Physical access control (electronic lock & key)
1. Introduction
The AT88SA102S is a member of the CryptoAuthentication family
of cost-effective authentication chips designed to securely
authenticate an item to which it is attached. It can also be used to
exchange session keys with some remote entity so that the system
microprocessor can securely encrypt/decrypt data. Each
CryptoAuthentication chip contains a pre-programmed serial
number which is guaranteed to be unique. In addition, it has been
designed to permit secure personalization so that third parties can
build devices containing an OEM secret without concern for the
theft of that secret.
It is the first small standard product to implement the SHA-256 hash
algorithm, which is part of the latest set of recommended algorithms
by the US Government. The 256 bit key space renders any
exhaustive attacks impossible.
The CryptoAuthentication family uses a standard challenge
response protocol to simplify programming. The system generates
a random number challenge and sends it to the
CryptoAuthentication chip. The chip hashes that with a 256 bit key
using the SHA-256 algorithm to generate a keyed 256 bit response
which is sent back to the system.
CryptoAuthentication™
AT88SA102S
Product
Authentication Chip
Preliminary
8584B–SMEM–09/09