AT88SC6416CRF-MR1 View Datasheet(PDF) - Atmel Corporation

Part Name

Description

Manufacturer

AT88SC6416CRF-MR1

CryptoRF® Specification

Atmel Corporation 

AT88SC0808/1616/3216/6416CRF, AT88RF04C

Figure 39.

Encryption Activation Procedure

Host System

Operations

i = Card Key Set Number

(Same i as used for

Authentication)

START

Encryption

Activation

CryptoRF Card

Operations

Receive

Verify Crypto

Command with

QE and ChE

Note: CryptoRF Card must

be in Authentication Mode

before Starting

Encryption Activation

Session Key

SA

Cryptogram

CA

Generate

Random

Number QE

Store

CE

Goto START

Authentication

YES

Do you want

to retry ?

NO

END

(FAILURE)

Calculate

Challenge ChE,

Cryptogram CE,

SE (not used)

with SA, CA, QE

using F2 Function

Send Verify Crypto

Command with

QE and ChE

Receive Response

Verify Crypto Command

Response

Encryption

Activation

Failed

Is

Response

NACK

YES

?

NO

Response is ACK

NO

Response is

Unknown

Is card in

Authentication

Mode ?

NO

YES

Is Key

Index Correct

?

NO

YES

Is AACi Max ?

YES

NO

Calculate

Challenge CH,

Cryptogram CiE,

SiE (not used)

with SiA, CiA, QE

using F2 Function

Session Key

SiA

Cryptogram

CiA

Does

ChE match

CH ?

NO

YES

Store CiE

Increment

and Store

AACi

Read

AACi

Is AACi

Cleared ?

NO

YES

Clear

AACi

Send

ACK

Response

Card enters

Encryption Mode

Send

NACK

Response

Card enters

Normal Mode

Read System Zone Command

Encryption

Activation

Complete

Host enters

Encryption Mode

END

Encryption

Activation

Return Data

Answer with

AACi

5276C–RFID–3/09

123

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