ACS ADT60 BioSIMKey Manual de usuario

BioSIMKey - ADT60 Reference Manual rev 1.0, April, 2002

Advanced Card Systems Ltd. Page 1 of 26

ADT60

Reference Manual

BioSIMKey

Fingerprint Scanner & Plug-in Smart Card Reader

Advanced Card Systems Ltd.

Room 302, 3/F., Shun Fat Industrial building,

el: 852-2796 7873 Fax: 852-2796 1286

Website: www.acs.com.hk

mail : info@acs.com.hk

BioSIMKey - ADT60 Reference Manual rev 1.0, April, 2002

Advanced Card Systems Ltd. Page 2 of 26

TABLE OF CONTENTS

1. Introduction ……………………………………………………………………………….. 4

2. Features ……………………………………………………………………………………. 4

3. Finger print scanner ……………………………………………………………………... 5

4. Smart card reader ………………………………………………………………………... 6

4.1 Supported Card Types ……………………………………………………………… 6

4.1.1 Microcontroller-based smart cards (asynchronous interface) …………... 6

4.2 Smart Card Interface ………………………………………………………………… 6

4.2.1 Smart Card Power Supply VCC (C1) ……………………………………… 6

4.2.2 Programming Voltage VPP (C6) …………………………………………... 7

4.2.3 Card Type Selection ………………………………………………………... 7

4.2.4 Interface for Microcontroller-based Cards ………………………………... 7

4.2.5 Card Tearing Protection …………………………………………………… 7

5. Power Supply ……………………………………………………………………………... 8

6. USB Interface ……………………………………………………………………………… 8

7. PC-Reader Communication protocol ………………………………………………… 9

7.1 Command …………………………………………………………………………..… 9

7.1.1 Normal Command (Length < 255 bytes) ………………………………….. 9

7.1.2 Extended Command ………………………………………………………... 10

7.2 Response …………………………………………………………………………...… 11

7.2.1 No transmission error with normal response (Length < 255 bytes) …… 11

7.2.2 No transmission error with extended response ………………………..… 12

7.2.3 Transmission error ………………………………………………………….. 12

7.3 Reset Message ………………………………………………………………………. 13

7.4 Card Status Message ……………………………………………………………….. 13

7.5 Transmission Protocol ………………………………………………………………. 14

8. Smart card Commands ………………………………………………………………….. 16

8.1 Control Commands …………………………………………………………………. 16

8.1.1 GET_ACR_STAT …………………………………………………………… 16

8.1.2 SET_PROTOCOL …………………………………………………………... 17

8.1.3 SELECT_CARD_TYPE …………………………………………………….. 18

8.1.4 RESET ……………………………………………………………………….. 19

8.1.5 SET_NOTIFICATION ………………………………………………………. 19

8.1.6 SET_PPS_MODE …………………………………………………………... 20

8.2 Card Commands (MCU-based Card) ……………………………………………… 20

8.2.1 RESET ………………………………………………………………………... 20

8.2.2 POWER_OFF ………………………………………………………………... 21

8.2.3 EXCHANGE_APDU …………………………………………………………. 21

8.2.4 EXCHANGE_T1_FRAME …………………………………………………... 22

BioSIMKey - ADT60 Reference Manual rev 1.0, April, 2002

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Appendix A: Supported Card Types ……………………………………………………… 23

Appendix B: Response Status Codes ……………………………………………………. 24

Appendix C: Technical Specifications …………………………………………………… 25

Appendix D: Recommended device cleaning procedure …………………………….. 26

BioSIMKey - ADT60 Reference Manual rev 1.0, April, 2002

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1. INTRODUCTION

The ACS BioSIMKey (ADT60) is a device which combines a fingerprint scanner and a smart

card reader/writer. The fingerprint scanner (TouchChip) makes use of the Active Captive-

Sensing Technology from STMicroelectronics. The reader/writer part enables the

communication between a computer (for example, a PC) and a smart card.

Since fingerprints cannot be lost, duplicated, stolen or forgotten, the TouchChip product is

regarded as providing a more reliable and convenient solution than traditional security

devices. With BioSIMKey, security is improved further by storing the fingerprint templates

inside a SIM card instead of the PC. This not only provides a more secure environment but it

also enhances portability and eliminates privacy concerns. It also gives the user the flexibility

of being able to carry their fingerprint template with them, assured with the knowledge that no

one else can use their smart card should it become lost or stolen.

In the present state of the smart card industry, different types of smart cards use different

commands and different communication protocols. In most cases, this situation prevents the

direct communication between a smart card and a computer. The BioSIMKey Reader/Writer

establishes a uniform interface between the computer and the smart card for a wide variety of

cards. By taking care of the card-specific particulars, it releases the computer software

programmer from getting involved with the technical details of the smart card operation, which

in many cases are not relevant for the implementation of a smart card system.

The BioSIMKey is connected to the computer through a USB interface. The device accepts a

command from the computer, carries out the specified function on the TouchChip and the

smart card and returns the requested data or status information back to the computer.

2. FEATURES

 Ideal for laptop users – can be carried in your pocket

 Enhanced security by requiring a fingerprint instead of PIN or password

 Active Capacitive-Sensing Technology ensures highest quality images

 ISO7816-1/2/3 compatible smart card interface

 Supports CPU-based cards with T=0 and/or T=1 protocol

 Support PPS (Protocol and Parameters Selection) with 9600 – 115200 bps in reading

and writing into smart cards

 Full speed USB interface

BioSIMKey - ADT60 Reference Manual rev 1.0, April, 2002

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3. FINGERPRINT SCANNER

BioSIMKey is built around the TouchChip Silicon fingerprint sensor. It is a fast, reliable and

inexpensive fingerprint peripheral, which can be used to authenticate users of computers and

all kinds of information technology devices.

The TouchChip device is suitable for applications such as desktop access control, network

security, Internet-based applications and commercial verification and identification systems. It

contains all the necessary biometric components: fingerprint sensing, image optimization and

matching. Application Program Interface (API) is also provided for easy integration into

applications and to save a lot of development time. (Please refer to Programmer’s Guide for

more information on API.)

TouchChip active capacitive sensing provides a much higher immunity to parasitic effects

leading to a higher signal-to-noise ratio and the ability to capture a wider range of fingerprints

than competing technologies, such as passive capacitive sensing.

Typically there are two processes involved in a biometric application:

Enrollment:

Before the identity of an individual can be verified via his/her fingerprints, it is necessary to

capture one or several fingerprint samples. This process is called enrollment. The samples

are referred to as fingerprint templates and can be stored on a broad range of media such as

computer storage devices or smartcards.

Verification:

The verification process requires a user to verify his identity by placing his finger on the

fingerprint scanner sensor. The live fingerprint is compared with a stored template using a

matching algorithm in order to determine whether they represent the same set of fingerprint.

The matching result is then made available to the computer.

When using the fingerprint device, the security level is mainly governed by two parameters:

False Acceptance Rate (FAR):

FAR is the probability that a false sample matches with the original template previously

extracted from the subject’s fingerprint images during enrollment.

False Rejection Rate (FRR):

FRR is the rate at which the system incorrectly rejects a legitimate attempt to verify.

BioSIMKey - ADT60 Reference Manual rev 1.0, April, 2002

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4. SMART CARD READER

4.1 Supported Card Types

The BioSIMKey can operate MCU card with T=0 and T=1 protocol. The table presented in

Appendix A explains which card type selection value must be specified for the various card

types supported by the reader.

4.1.1 Microcontroller-based smart cards (asynchronous interface)

The BioSIMKey supports EEPROM microcontroller-based cards with internal programming

voltage (VPP) generation and the following programming parameters transmitted in the ATR:

PI1 = 0 or 5

I = 25 or 50

The BioSIMKey performs the Protocol and Parameters Selection (PPS) procedure as

specified in ISO7816-3:1997.

When the card ATR indicates the specific operation mode (TA2present; bit b5 of TA2must be

0) and that particular mode is not supported by the BioSIMKey, the reader will reset the card

and set it to negotiable mode. If the card cannot be set to negotiable mode, the reader will

reject the card.

When the card ATR indicates the negotiable mode (TA2not present) and communication

parameters other than the default parameters, the BioSIMKey will execute the PPS and try to

use the communication parameters that the card suggested in its ATR. If the card does not

accept the PPS, the reader will use the default parameters (F=372, D=1).

For the meaning of the aforementioned parameters, please refer to ISO7816, part 3.

4.2 Smart Card Interface

The interface between the BioSIMKey and the inserted smart card follows the specifications

of ISO7816-3 with certain restrictions or enhancements to increase the practical functionality

of the BioSIMKey.

4.2.1 Smart Card Power Supply VCC (C1)

The current consumption of the inserted card must not be higher than 50mA.

BioSIMKey - ADT60 Reference Manual rev 1.0, April, 2002

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4.2.2 Programming Voltage VPP (C6)

According to ISO 7816-3, the smart card contact C6 (VPP) supplies the programming voltage

to the smart card. Since all common smart cards in the market are EEPROM based and do

not require the provision of an external programming voltage, the contact C6 (VPP) has been

implemented as a normal control signal in the BioSIMKey. The electrical specifications of this

contact are identical to those of the signal RST (at contact C2).

4.2.3 Card Type Selection

The controlling PC has to always select the card type through the proper command sent to

the BioSIMKey prior to activating the inserted card. This includes both the memory cards and

MCU-based cards.

For MCU-based cards the reader allows the user to select the preferred protocol, T=0 or T=1.

However, this selection is only accepted and carried out by the reader through the PPS when

the card inserted in the reader supports both protocol types. Whenever an MCU-based card

supports only one protocol type, T=0 or T=1, the reader automatically uses that protocol type,

regardless of the protocol type selected by the application.

4.2.4 Interface for Microcontroller-based Cards

For microcontroller-based smart cards only the contacts C1 (VCC), C2 (RST), C3 (CLK), C5

(GND) and C7 (I/O) are used. A frequency of 4 MHz is applied to the CLK signal (C3).

4.2.5 Card Tearing Protection

The BioSIMKey provides a mechanism to protect the inserted card when it is suddenly

withdrawn while it is powered up. The power supply to the card and the signal lines between

the BioSIMKey and the card are immediately deactivated when the card is being removed. As

a general rule, however, to avoid any electrical damage, a card should only be removed

from the reader while it is powered down.

NOTE - The BioSIMKey never does by itself switch on the power supply to the inserted card. This action must be

explicitly done by the controlling computer through the proper command sent to the reader.

BioSIMKey - ADT60 Reference Manual rev 1.0, April, 2002

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5. POWER SUPPLY

The BioSIMKey requires a voltage of 5V DC, 100mA, regulated, power supply. The

BioSIMKey gets the power supply from the PC through the cable supplied along with the

device.

Status LEDs

Red LED on the front of the reader indicate the activation status of the smart card interface:

Red LED Indicates power supply to the smart card is switched on, i.e., the smart card is

activated.

6. USB INTERFACE

The BioSIMKey is connected to a computer through a USB following the USB standard.

i) Communication Parameters

The BioSIMKey is connected to a computer through USB as specified in the USB

Specification 1.1. The BioSIMKey is working in full speed mode, i.e. 12 Mbps.

USB Interface Wiring

Pin Signal Function

1 VBUS +5V power supply for the reader

2 D- Differential signal transmits data between BioSIMKey and PC.

3 D+ Differential signal transmits data between BioSIMKey and PC.

4 GND Reference voltage level for power supply

NOTE - In order for the BioSIMKey to function properly through the USB interface, ACS PC/SC device driver has to

be installed. Please refer to the BioSIMKey Device Driver Installation Guide for more detail.

BioSIMKey - ADT60 Reference Manual rev 1.0, April, 2002

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7. PC-READER COMMUNICATION PROTOCOL

In normal operation, the BioSIMKey smart card reader acts as a slave with regard to the

communication between a computer and the device. The communication is carried out in the

form of successive command-response exchanges. The computer transmits a command to

the reader and receives a response from the reader after the command has been executed. A

new command can be transmitted to the BioSIMKey smartcard reader only after the response

to the previous command has been received.

There are only two cases where the reader transmits data without having received a

command from the computer, namely, the Reset Message of the reader and the Card Status

Message.

7.1 Command

7.1.1 Normal Command (Length < 255 bytes)

A command consists of four protocol bytes and a variable number of data bytes and has the

following structure:

Byte 1 2 3 4 ... N+3 (0<N<255) N+4

Header Instruction Data length = N Data Checksum

Header Always 01Hto indicate the start of a command.

Instruction The instruction code of the command to be carried out by the BioSIMKey

Data Length Number of subsequent data bytes.(0 < N < 255)

Data Data contents of the command.

For a READ command, for example, the data bytes would specify the start

address and the number of bytes to be read. For a WRITE command, the

data bytes would specify the start address and the data to be written to the

card.

The data bytes can represent values to be written to a card and/or command

parameters such as an address, a counter, etc.

Checksum The checksum is computed by XORing all command bytes including header,

instruction, data length and all data bytes.

BioSIMKey - ADT60 Reference Manual rev 1.0, April, 2002

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The following example shows the structure of a command with instruction code = 91Hand

three data bytes with the values 11H, 22Hand 33H, respectively:

byte 1 2 3 4 5 6 7

01 H91 H03

H11

H22

H33

H93 H

7.1.2 Extended Command

A command consists of six protocol bytes and a variable number of data bytes and has the

following structure:

byte 1 2 3 4 5 6 ... N+5

(N>0)

N+6

Header Instruction Data Length = N Data Checksum

FFHData Length N

Header Always 01Hto indicate the start of a command.

Instruction The instruction code of the command to be carried out by the BioSIMKey.

Data Length Number of subsequent data bytes, and is encoded in 3 bytes. The first byte

is FFH. The second byte and the third byte represent data length N.

Data Data contents of the command.

For a READ command, for example, the data bytes would specify the start

address and the number of bytes to be read. For a WRITE command, the

data bytes would specify the start address and the data to be written to the

card.

The data bytes can represent values to be written to a card and/or command

parameters such as an address, a counter, etc.

Checksum The checksum is computed by XORing all command bytes including header,

instruction, data length and all data bytes.

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