器件名称:
DS28C22
功能描述:
由Maxim推出的一款安全存储器，具有加密强，双向，响应认证和消息加密功能，还有助于加密的读取和使用一次性垫主机和从机之间写入的内容。在不使用时，可以进入最低功耗睡眠模式。可应用于：系统知识产权保护、密钥生成和安全交换的加密图形系统等等。
文件大小:
748.45KB 共5页
简 介:
ABRIDGED DATA SHEET EVALUATION KIT AVAILABLE DS28C22 DeepCover Secure Memory with I2C SHA-256 and 3Kb User EEPROM General Description DeepCoverM embedded security solutions cloak sensitive data under multiple layers of advanced physical security to provide the most secure key storage possible. The DeepCover Secure Memory (DS28C22) combines crypto-strong, bidirectional, secure challenge-andresponse authentication and small message encryption functionality with an implementation based on the FIPS 180-specified Secure Hash Algorithm (SHA-256). A 3Kb user-programmable EEPROM array provides nonvolatile storage for application data and additional protected memory holds a read-protected secret for SHA-256 operations and settings for user memory control. Each device has its own guaranteed unique and unalterable 64-bit ROM identification number (ROM ID) that is factory programmed into the chip. This unique ROM ID is used as a fundamental input parameter for cryptographic operations and also serves as an electronic serial number within the application. A bidirectional security model enables twoway authentication and encryption between a host system and slave-embedded DS28C22. Slave-to-host authentication is used by a host system to securely validate that an attached or embedded DS28C22 is authentic. Hostto-slave authentication is used to protect DS28C22 user memory from being modified by a nonauthentic host. The SHA-256 message authentication code (MAC), which the DS28C22 generates……
