The AT88SA family of low-cost, ultralow- power authentication ICs from Atmel® Corporation (San Jose, CA) have an embedded SHA-256 engine and 256-bit cryptographic key. The first device in the family, the AT88SA102S, is a general purpose CrytpoAuthentication™ IC designed to protect consumers from counterfeit electronic and medical consumables, such as batteries, ink cartridges, test strips, blood bags, and breathing tubes. They can be used in any microcontroller-based system to secure network data transmissions such as satellite radio broadcasts or medical records, protect end-products from bogus firmware updates, and validate software or media modules.
CryptoAuthentication ICs are the ideal complement to AVR and ARM microcontrollers that include AES encryption engines, as they can securely store an encryption key for information stored within various bulk memory devices on the system, while the controller can quickly encrypt or decrypt the data using this key. The 256-bit size makes it essentially impossible to crack using brute force methods.
The AT88SA102S includes 23-bits of one-time-programmable fuses that can be used for personalization, status, or consumption logging, and a guaranteed unique 48-bit serial number. The device has a high-speed single wire interface that is compatible with all microcontrollers, supports a wide supply voltage range of 2.5V to 5.5V, and a 1.8V to 5.5V communications voltage range.
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