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PDF P5DF081 Data sheet ( Hoja de datos )
| Número de pieza | P5DF081 | |
| Descripción | MIFARE SAM AV2 | |
| Fabricantes | NXP Semiconductors | |
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P5DF081
MIFARE SAM AV2
Rev. 1 — 12 August 2010
191710
Objective short data sheet
PUBLIC
www.DataSheet4U.com
1. General description
The NXP MIFARE SAM TM AV2 hardware solution is the ideal add-on for reader devices
offering additional security services. Supporting TDEA, AES and RSA capabilities, it offers
secure storage and secure communication in a variety of infrastructures.
Unlike other products in the field, MIFARE SAM AV2 has proven interoperability with all of
NXP's broad card portfolio, (MIFARE Ultralight, MIFARE Ultralight C, MIFARE 1K,
MIFARE 4K, MIFARE Plus, MIFARE DESFire, MIFARE DESFire EV1 and SmartMX
solutions), making it the most versatile and secure SAM solution on the market today.
Secured communication
When used in combination with a reader IC supporting innovative "X" features, MIFARE
SAM AV2 provides a significant boost in performance to the reader along with faster
communication between reader and module. The "X" feature is a new way to use the SAM
in a system, with SAM connected to the microcontroller and the reader IC simultaneously.
The connection between the SAM and the reader is performed using security protocols
based on either symmetric cryptography (TDEA and AES) or PKI RSA asymmetric
cryptography. The protocols comply with the state-of-art standards and thereby ensure
data confidentiality and integrity.
2. Features and benefits
2.1 Cryptography
Supports MIFARE Crypto1, TDEA (Triple DES encryption algorithm), RSA and AES
cryptography
Supports MIFARE Ultralight, MIFARE Ultralight C, MIFARE 1K, MIFARE 4K,
MIFARE Plus, MIFARE DESFire, MIFARE DESFire EV1
Secure storage and updating of keys (key usage counters)
128 key entries for symmetric cryptography and 3 RSA key entries for asymmetric
cryptography
TDEA and AES based key diversification
Offline cryptography
2.2 Communication
Up to four logical channels; simultaneous multiple card support
Support for DESFire and MIFARE Plus authentication (with related secure messaging
and session key generation)
1 page  
NXP Semiconductors
P5DF081
MIFARE SAM AV2
The maximum specified bit rate in any case is 1.5 Mbit/s.
8.1.3 Card operation procedures
www.DataSheet4U.com
All card operation procedures (activation, cold reset, warm reset and deactivation) are
fully compliant with Ref. 19, Chapter 5.
8.2 Transmission procedure and communication
8.2.1 Protocol activation sequence
All subsequently described operations are compliant with ISO/IEC 7816-3.
8.2.1.1 Answer To Reset (ATR)
The MIFARE SAM AV2 offers two modes of operation identified by different ATRs.
A negotiable mode where the bit rate has to be adjusted via a PPS request and a specific
mode where the MIFARE SAM AV2 switches automatically to F = 128 and D = 32 (highest
possible speed) after sending the ATR. Starting with the negotiable mode, the mode of
operation is switched after every warm reset.
After a cold reset, the card sends the following ATR to the terminal.
Table 4. ATR after cold reset
Character
Value
TS 3Bh
T0 DFh
TA(1)
TC(1)
TD(1)
TD(2)
18h
FFh
81h
F1h
TA(3)
TB(3)
TC(3)
TD(3)
FEh
43h
00h
3Fh
TA(after T = 15) 03h
TB(after T = 15) 83h
Historical bytes
TCK
4Dh, 49h, 46h, 41h, 52h,
45h, 20h, 50h, 6Ch, 75h,
73h, 20h, 53h, 41h, 4Dh
3B
Meaning
initial character; setting up direct convention
TA(1), TC(1), TD(1) are present; number of
historical characters is 15
F = 372; D = 12
no extra guard time needed; N = 255
TD(2) is present; protocol T = 1
TA(3), TB(3), TC(3) and TD(3) are present; protocol
T=1
Information field size of the card = 254
BWT indicator = 4; CWT indicator = 3
error detection code = LRC
TA and TB for T = 15 is present; protocol T = 15
(qualifies global interface bytes)
clock stop not supported; Class A, Class B
Proprietary use of C6 (IO3, reception of serial data
from RC222)
ASCII value of “MIFARE Plus SAM”
check character
After this ATR, the card is in the negotiable mode and waits for a PPS request. If a warm
reset is issued, the MIFARE SAM AV2 switches the mode of operation, enters the specific
mode and sends the following ATR.
P5DF081_SDS
Objective short data sheet
PUBLIC
All information provided in this document is subject to legal disclaimers.
Rev. 1 — 12 August 2010
191710
© NXP B.V. 2010. All rights reserved.
5 of 36
5 Page 
NXP Semiconductors
P5DF081
MIFARE SAM AV2
8.4.5 Key versioning
The MIFARE SAM AV2 reserves three bytes in a key entry to store the verwsiwonwo.Df athtaeShthereet4eU.com
available keys in the entry. This version byte contains the key version for all kinds of keys
(DES, TDEA, AES and MIFARE). The version information must be included separately in
every key entry of type AES or MIFARE when it is updated by the ChangeKeyEntry
command.
8.4.6 Key usage counters
In order to count and limit the number of authentications a key entry can be used for,
MIFARE SAM AV2 stores a table of 16 key usage counter entries, 00h to 0Fh, which are
automatically incremented each time a defined key entry is used for authentication.
Multiple key entries can use the same counter.
8.4.6.1 Reference number
The property RefNoKUC codes the reference number of the key usage counter.
RefNoKUC is the index of the entry in the table and can have the value 00h to 0Fh,
therefore 16 key usage counters can be stored.
8.4.6.2 Limit
This field stores the current limit for this key usage counter. It is only possible to use a key
that is linked to this counter for authentication if the current value (see below) is smaller
than the current limit. As soon as the current value is equal to, or higher than, the current
limit, the usage of all key entries linked to this counter is prohibited.
8.4.6.3 Key reference number to change the current KUC entry
In order to change the KUC, a successful authentication by the host application of the
MIFARE SAM AV2 is necessary. The KeyNoCKUC defines the reference number of the
KST which is used for this.
8.4.6.4 Key version to change the current KUC entry
The 1-byte field holds the key version within the key entry specified to change the KUC
entry. The key version has to be in the range of 00h to FFh. The MIFARE SAM AV2 will
automatically select the appropriate key from one of three positions in the entry that has
the specified version number.
8.4.6.5 Current value
The CurVal field stores the current value of this key usage counter. It is possible to use all
keys referring to this counter for authentication only if the current value is smaller than the
current limit.
8.5 SAM - Host communication
8.5.1 General principles for SAM-Host protection
MIFARE SAM AV2 supports two different modes: AV1 compatibility mode and MIFARE
SAM AV2 mode. A MIFARE SAM AV2 is initially in MIFARE SAM AV1 compatibility mode.
It can be switched to the MIFARE SAM AV2 by executing a host authentication with the
SAM Master Key using the SAM_LockUnlock command. Note that MIFARE SAM AV2
mode activation is thus only possible if the SAM Master Key is configured as an AES128
P5DF081_SDS
Objective short data sheet
PUBLIC
All information provided in this document is subject to legal disclaimers.
Rev. 1 — 12 August 2010
191710
© NXP B.V. 2010. All rights reserved.
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