Atmel ATSHA204 SHA－256密码系统解决方案

Atmel公司的ATSHA204是采用安全哈希算法(SHA)的全加密安全器件,可以用在大多数密码系统,是现代大多数安全认证协议的元件.器件包括了高质量硬件随即号码发生器(RNG)以及联邦信息处理标准(FIPS)确定性的随机比特发生器(DRBG),从而防止重放攻击.每个器件保证有单独的72位序列码,主要用在附件,女儿板等的防复制保护,网络和计算机的安全访问,加密下载的密钥更改,控制网络的加密通信以及建筑物控制和消费类电子等.本文介绍了ATSHA204主要特性, 评估板AT88CK490主要特性,电路图和材料清单.
The Secure Hash Algorithm (SHA) family of algorithms is widely used in most cryptographic systems and is a component of most modern authentication protocols. These devices provide secure key storage and a tested turnkey hardware implementation of the SHA-256 algorithm.
All devices include a high-quality hardware random number generator (RNG) paired with a Federal Information Processing Standards (FIPS) Deterministic Random Bit Generator (DRBG) to prevent replay attacks. The RNG is available to the system for general-purpose use as well as being integrated into the on-board protocols.
The members of the Atmel SHA2 authentication family feature a wide array of defensive mechanisms specifically designed to prevent physical attacks on the chip itself or logical attacks on the data transmitted between the chip and the system. All devices are also equipped with secure personalization features to facilitate third-party product manufacturing.
Each device ships with a guaranteed unique 72-bit serial number. Using the cryptographic protocols supported by the chip, a host system or remote server can prove that the serial number is both authentic and not a copy.
The Atmel® ATSHA204 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...