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PDF AT88SC0204CRF Data sheet ( Hoja de datos )
| Número de pieza | AT88SC0204CRF | |
| Descripción | 13.56 MHz CryptoRF EEPROM Memory 2 Kbits | |
| Fabricantes | ATMEL Corporation | |
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Features
• One of a Family of Devices with User Memory of 1 Kbit to 64 Kbits
• Contactless 13.56 MHz RF Communications Interface
– ISO/IEC 14443-2:2001 Type B Compliant
– ISO/IEC 14443-3:2001 Type B Compliant Anticollision Protocol
– Command Set Optimized for Multicard RF Communications
– Tolerant of Type A Signaling for Multiprotocol Applications
• Integrated 82 pF Tuning Capacitor
• User EEPROM Memory
– 2 Kbits Configured as Four 64-byte (512-bit) User Zones
– Byte, Page, and Partial Page Write Modes
– Self-timed Write Cycle
• 256-byte (2-Kbit) Configuration Zone
– User-programmable Application Family Identifier (AFI)
www.DataShee–t4UU.sceomr-defined Anticollision Polling Response
– User-defined Keys and Passwords
• High-Security Features
– 64-bit Mutual Authentication Protocol (under license of ELVA)
– Encrypted Checksum
– Stream Encryption
– Four Key Sets for Authentication and Encryption
– Four Sets of Two 24-bit Passwords
– Password and Authentication Attempts Counters
– Selectable Access Rights by Zone
– Antitearing Function
– Tamper Sensors
• High Reliability
– Endurance: 100,000 Write Cycles
– Data Retention: 10 Years
– Operating Temperature: −40°C to +85°C
13.56 MHz
CryptoRF
EEPROM Memory
2 Kbits
AT88SC0204CRF
Summary
Description
The CryptoRF® family integrates a 13.56 MHz RF interface into a CryptoMemory®,
resulting in a contactless smart card with advanced security and cryptographic fea-
tures. This device is optimized as a contactless secure memory, for RF smart cards,
and secure data storage, without the requirement of an internal microprocessor.
For communications, the RF interface utilizes the ISO/IEC 14443-2 and -3 Type B bit
timing and signal modulation schemes, and the ISO/IEC 14443-3 Slot-MARKER Anti-
collision Protocol. Data is exchanged half duplex at a 106-kbit/s rate, with a two-byte
CRC_B providing error detection capability. The maximum communication range
between the reader antenna and contactless card is approximately 10 cm when used
with an RFID reader that transmits the maximum ISO/IEC 14443-2 RF power level.
The RF interface powers the other circuits; no battery is required. Full compliance with
the ISO/IEC 14443-2 and -3 standards results in anticollision interoperability with the
AT88RF020 2-Kbit RFID EEPROM product and provides both a proven RF communi-
cation interface and a robust anticollision protocol.
The AT88SC0204CRF contains 2 Kbits of user memory and 2 Kbits of configuration
memory. The 2 Kbits of configuration memory contain four sets of read/write pass-
words, four crypto key sets, security access registers for each user zone, and
password/key registers for each zone.
The CryptoRF command set is optimized for a multicard RF communications environ-
ment. A programmable AFI register allows this IC to be used in numerous applications
in the same geographic area with seamless discrimination of cards assigned to a par-
ticular application during the anticollision process.
Rev. 5022CS–CRRF–12/06
Note: This is a summary document. A complete document is available
under NDA. For more information, please contact your local Atmel
sales office.
1 page  
AT88SC0204CRF
Communication
Security
www.DataSheet4U.com
Security Methodology
Communication between the PICC and reader operates in three basic modes. Standard
mode is the default mode for the device after power-up and anticollision. Authentication
mode is activated by a successful authentication sequence. Encryption mode is
activated by a successful encryption activation, following a successful authentication.
Table 2. Configuration Security Modes
Mode
User Data
Passwords
Standard
clear
clear
Authentication
clear
encrypted
Encryption
encrypted
encrypted
Notes: 1. Modification Detection Code
2. Message Authentication Code
Data Integrity
Check
MDC(1)
MAC(2)
MAC(2)
Figure 3. Security Methodology
Device (card)
Card Number
VERIFY A
Compute Challenge B
Challenge B
Host (reader)
COMPUTE Challenge A
Challenge A
VERIFY B
Check Password (RPW)
DATA
Checksum (CS)
Check Password (WPW)
VERIFY CS
Write DATA
Read Password (RPW)
VERIFY CS (optional)
Write Password (WPW)
DATA
CS
Memory Access
Depending on the device configuration, the host will carry out the authentication protocol
and/or present different passwords for each operation: read or write. To insure security
between the different user zones (multiapplication card), each zone can use a different
set of passwords. A specific attempts counter for each password and for the
authentication provides protection against systematic attacks.
5022CS–CRRF–12/06
5
5 Page | ||
| Páginas | Total 9 Páginas | |
| PDF Descargar | [ Datasheet AT88SC0204CRF.PDF ] | |
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