AT88SC1608 View Datasheet(PDF) - Atmel Corporation
Part Name
Description
MFG CO.
'AT88SC1608' PDF : 25 Pages View PDF
Description
The AT88SC1608 provides 17,408 bits of serial EEPROM memory organized as one
configuration zone of 128 bytes and eight user zones of 256 bytes each. This device is
optimized as a “secure memory” for the smart card market, secure identification for elec-
tronic data transfer, or components in a system, without the requirement of an internal
microprocessor.
The embedded authentication protocol allows the memory and the host to authenticate
each other. When this device is used with a host which incorporates a microcontroller
(e.g., AT89C51, AT89C2051, AT90S1200), the system provides an “anti-wiretapping”
configuration. The device and the host exchange “challenges” issued from a random
generator and verify their values through a specific cryptographic function included in
each part. When both agree on the same result, the access to the memory is permitted.
Figure 1. Security Methodology
Device
Host (Reader)
Card Number
Verify A
COMPUTE Challenge B
Challenge B
VERIFY (RPW)
DATA
VERIFY (WPW)
Write 0 or 1
COMPUTE Challenge A
Challenge A
VERIFY B
Read Password (RPW)
Write Password (WPW)
DATA
2 AT88SC1608
0971G–SMEM–04/04
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