[原创] Atmel ATSHA204AUSB软件保护器(加密狗)解决方案

Atmel公司的ATAES132A,ATSHA204A和ATECC508A是完整的加密器件,包括分成16个区的4.5Kb EEPROM,用来存储密钥数据,各种读/写数据,仅读数据,密码或保密数据以及消耗跟踪控制.访问各个部分存储器由不同方法进行限制,主要用在安全下载和引导,加密控制,反复制和信息安全.本文介绍了ATSHA204A主要特性和应用框图,以及采用ATSHA204A, ATAES132A和ATECC508A的CryptoAuthentication™ USB加密狗评估板AT88CK590主要特性,电路图和材料清单.

The Atmel® ATSHA204A is a full turnkey security device. It includes a 4.5Kb EEPROM divided into 16 slots. This array can be used for storage of keys, miscellaneous read/write, read-only, password or secret data, and consumption tracking. Access to the various sections of memory can be restricted in a variety of ways and then the configuration locked to prevent changes.

Access to the chip is through a standard I²C interface at speeds up to 1Mb/sec. The chip also supports a single-wire interface that can reduce the number of GPIOs required on the system processor and/or reduce the number of pins on connectors. It is compatible with most UART or serial I/O controllers. System integration is eased with a wide supply voltage range and an ultra-low sleep current of less than 100nA.
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