AT88RF04C-MY1G View Datasheet(PDF) - Atmel Corporation
Part Name
Description
Manufacturer
AT88RF04C-MY1G Datasheet PDF : 158 Pages
| |||
AT88SC0808/1616/3216/6416CRF, AT88RF04C
Figure 35.
Mutual Authentication Procedure
Host System
Operations
START
Authentication
i = Card Key Set Number
Store
ID
Read Card
ID
(Nc field
or other ID)
Read System Zone Command
Return Data
CryptoRF Card
Operations
Answer with
Nc
(or equivalent)
Note: CryptoRF Card must
be in Active State before
Starting Authentication
Store C =
AACi + Ci
Alternate Flow (if new "C" already stored)
END
(FAILURE)
Card
Auth Key Set
is Locked
Read
AACi and
Cryptogram Ci
Is AACi Max ?
YES
NO
Read System Zone Command
Return Data
Answer with
AACi and
Cryptogram Ci
Receive
Verify Crypto
Command with
QA and ChA
Card enters
Normal Mode
Secret Host
Key K
+
x,y,z (if reqd.)
Generate
Random
Number QA
Store CA
and
Session Key
SA
YES
Do you want
to retry ?
NO
END
(FAILURE)
Calculate
Diversified Key G
with K, ID, x, y, z
using F1 Function
Calculate
Challenge ChA,
Cryptogram CA
Session Key SA
with G, C, QA
using F2 Function
Send Verify Crypto
Command with
QA and ChA
Receive Response
Verify Crypto Command
Response
Is AACi Max ?
YES
NO
Calculate
Challenge CH,
Cryptogram CiA,
Session Key SiA
with Ci, Gi, QA
using F2 Function
Secret Seed
Gi
Cryptogram
Ci
Does
ChA match
CH ?
NO
HOST is
Authenticated
YES
Store CiA
and
Session Key
SiA
Increment
and Store
AACi
Card
Authentication
Failed
Store
AACi + CiA
Is
Response
NACK
YES
?
NO
Read
AACi and
Cryptogram
CiA
Is AACi
Cleared ?
NO
YES
Read System Zone Command
Does CiA
Match
NO
CA ?
Return Data
YES Host enters
Authentication Mode
Card is
Authenticated
Clear
AACi
Send
ACK
Response
Card enters
Authentication Mode
Send
NACK
Response
Card is in
Normal Mode
Answer with
AACi and
Cryptogram
CiA
END
Authentication
5276C–RFID–3/09
113
Share Link: 