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  AT88SC0104 card
The AT88SCxxxxC is a family of 9 high-performance secure memory devices providing 1K to 256K bits of user memory with advanced built-in security and cryptographic features. The mem-ory is divided into 4, 8 or 16 user zones each of which may be individually set with different security access rights or used together to provide space for one or multiple data files. Cryptom-emory has a configuration memory that contains registers to define the security rights for each user zone and space for passwords and secret keys used by the security logic of CryptoMemory.

Through dynamic, symmetric mutual authentication, data encryption, and the use of encrypted checksums, CryptoMemory provides a secure place for storage of
sensitive information within a system. With its tamper protection circuits, this information remains safe even under attack.

CryptoMemory also provides high security, low cost and ease of implementation of host-client type systems without the need for a microprocessor operating system. The embedded crypto-graphic engine provides for a dynamic, symmetric mutual authentication between the device and host, as well as performs stream encryption for all data and passwords exchanged between the device and host. Up to four unique key sets are available for these operations.

 > A Family of 9 Devices with User Memories from 1-Kbit to 256-Kbit
 > EEPROM User Memory
   - Four, Eight or Sixteen Zones
   - Self-timed Write Cycles
   - Single-Byte or Multiple
   - Byte Page-Write Modes
   - Programmable Access Rights for Each Zone
 > 2-Kbit Configuration Memory
   - 37-byte OTP Area for User-defined Codes
   - 160-byte Area for 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
   - Eight Sets of Two 24-bit Passwords
   - Anti-tearing Function
   - Voltage and Frequency Monitor
 > Embedded Application Features
   - Low Voltage Operation: 2.7V to 5.5V
   - Secure Nonvolatile Storage for Sensitive System or User Information
   - 2-wire Serial Interface
   - 1.0 MHz Compatibility for Fast Operation
   - Standard 8-lead Plastic Packages
   - Same Pinout as 2-wire Serial EEPROM's
 > Smart Card Features
   - ISO 7816 Class A (5V) or Class B (3V) Operation
   - ISO 7816-3 Asynchronous T = 0 Protocol
   - Multiple Zones, Key Sets and Passwords for Multi-application Use
   - Synchronous 2-wire Serial Interface for Faster Device Initialization
   - Programmable 8-byte Answer-To-Reset Register
   - ISO 7816-2 Compliant Modules
 > High Reliability
   - Endurance: 100,000 Cycles
   - Data Retention: 10 years
   - ESD Protection: 4,000V
  adobe reader logo   AT88SC0104 chip datasheet
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