Atmel AT88SC153 Secure Memory Smart Card

  • Designed for use in prepaid and loyalty smart card applications
  • Low cost secure memory
  • High Reliability
  • Anti-wiretapping configuration
  • Conforms to the ISO 7816-10

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Description

The Atmel AT88SC153 secure memory card provides 2,048 bits of serial EEPROM memory organized as one configuration zone of 64 bytes and three user zones of 64 bytes each. This device is optimized as a “secure memory” for multiapplication smart card markets, secure identification for electronic data transfer, or components in a system without the requirement of an internal microprocessor. The embedded authentication protocol allows the memory and the host to authenticate each other. When this device is used with a host that incorporates a microcontroller (e.g., AT89C51, AT89C2051, AT90S1200), the system provides an “anti-wiretapping” configuration. The device and the host exchange “challenges” issued from a random generator and verify their values through a specific cryptographic function included in each part. When both agree on the same result, the access to the memory is permitted.

Memory Access

Depending on the device configuration, the host might carry out the authentication protocol and/or present different passwords for each operation, read or write. Each user zone may be configured for free access for read and write or for password-restricted access. 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.” When the memory is unlocked, the two-wire serial protocol is effective, using SDA and SCL. The memory includes a specific register providing a 32-bit data stream conforming to the ISO 7816-10 synchronous answer-to-reset.

Software Development Kit

Program the Atmel AT88SC153 Memory Card with CardLogix’ Smart Toolz™ software development kit (SDK) featuring the user-friendly Card Configuration Utility (CCU), Winplex™ API, and CardAppz™ application software.

Features

  • One 64 x 8 (512-bit) Configuration Zone
  • Three 64 x 8 (512-bit) User Zones
  • Programmable Chip Select
  • Low-voltage Operation: 2.7V to 5.5V
  • Two-wire Serial Interface
  • 8-byte Page Write Mode
  • Self-timed Write Cycle (10 ms max)
  • Answer-to-reset Register
  • High-security Memory Including Anti-wiretapping
    • 64-bit Authentication Protocol (under exclusive patent license from ELVA)
    • Secure Checksum
    • Configurable Authentication Attempts Counter
    • Two Sets of Two 24-bit Passwords
    • Specific Passwords for Read and Write
    • Four Password Attempts Counters
    • Selectable Access Rights by Zone
  • ISO 7816 Compliant Packaging
  • High Reliability
    • Endurance: 100,000 Cycles
    • Data Retention: 100 Years
    • ESD Protection: 4,000V min
  • Low-power CMOS

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Comparison Chart

Atmel Secure Memory – Smart Cards (ISO 7816-3, T = 0)

Part Number Description Memory Organization Voltage RoHS Compliance
Secure Memory ICs with Password
AT88SC102 1K EEPROM with Password Security, Two 512-bit Zones 2 (512 x 1) 2.7 – 5.5 Yes
AT88SC1003 1K EEPROM with Password Security, Three Zones 2 (256 x 1) + 512 x 1 2.7 – 5.5 Yes
Secure Memory ICs with Password and Authentication
AT88SC153 1.5K EEPROM with Authentication, Three 512-bit Zones 3 (512 x 1) 2.7 – 5.5 Yes
AT88SC1608 16K EEPROM with Authentication, Eight 2-Kbit Zones 8 (2K x 1) 2.7 – 5.5 Yes
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