AT88SC0204C IC Datasheet

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 memory 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. Cryptomemory 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 cryptographic 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.