AT88SA10HS Datasheet, PDF (1/23 Pages) ATMEL Corporation – CryptoAuthentication™ Host Security Chip

Features
• Secure key storage to complement AT88SA100S and AT88SA102S
Devices
• Superior SHA-256 Hash Algorithm
• Guaranteed Unique 48 bit Serial Number
• High speed single wire interface, optionally shared with client
• Supply Voltage: 2.5 – 5.5V
• 1.8V – 5.5V communications voltage
• <100nA Sleep Current
• 4KV ESD protection
• Multi-level hardware security
• Secure personalization
• Green compliant (exceeds RoHS) 3 pin SOT-23 package
Applications
• Consumable device (battery, toner, other supplies) authentication
• Network & Computer Access control
• Authenticated communications for control networks
• Anti-clone authentication for daughter cards
• Physical access control (electronic lock & key)
1. Introduction
The CryptoAuthentication family of chips are the first cost-effective
authentication devices 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 AT88SA10HS host version of CryptoAuthentication chips is
capable of validating the response coming from the SHA-256
engine within an authentic CryptoAuthentication client (SA100S or
SA102S), even if that response includes within the computation the
serial number of the client. For detailed information on the
cryptographic protocols, algorithm test values and usage models,
refer to “AT88SA100S” and “AT88SA102S” Datasheets, along with
the application notes dedicated to this product family.
The host CryptoAuthentication performs 3 separate operations
(named HOST0, HOST1 & HOST2) to implement this validation.
The AT88SA10HS chip takes both the challenge and response as
inputs and returns a single Boolean indicating whether or not the
response is valid, in order to prevent the host chip from being used
to model a valid client.
The host system is responsible for generating the random challenge
that is sent to both the client and host CryptoAuthentication devices
as the AT88SA10HS does not include a random number generator.
CryptoAuthentication^™
Host Security Chip
AT88SA10HS
Preliminary
8595B–SMEM–09/09