AT88SC0104CA-SH Datasheet, PDF (54/66 Pages) ATMEL Corporation – Atmel CryptoMemory Specification Datasheet

Table 10-13. Verify Crypto
Verify Crypto
CLA INS : Command
P1
P2
**
$B8
000e 00nn
**
Data Sent
P3
Q1
Q8
CH1
CH8
$10
d₇--- ---d₀ d₆₃--- ---d₅₆ d₇--- ---d₀ d₆₃--- ---d₅₆
The device increments the associated attempts counter each time prior to verifying the challenge, to prevent attacks. If the
authentication succeeds, the device memorizes this success, clears the attempts counter and returns $90 $00. If the
authentication fails, the device simply returns $69 $00. If the maximum number of trials has been exceeded, the device will
return $69 $00 instead of the INS code, after receiving the header, to indicate the command is unauthorized.
Atmel AT88SC0104CA/0204CA/0404CA/0808CA [Datasheet]
54
8664E−CRYPTO−12/11