DeepCover® embedded security solutions cloak sensitive data under multiple layers of advanced physical security to provide the most secure key storage possible.
The DeepCover Secure Microcontroller (MAXQ1050) was designed for USB secure token and smart card reader applications that require certificate-based or other public key cryptographic schemes. The device also incorporates a sophisticated security mechanism to protect secret key data; two self-destruct inputs and environmental monitors (temperature and voltage sensors) erase secret key data when an attack condition is detected. The device has an integrated full-speed USB device interface (including transceiver), hardware SPI controller, and an ISO 7816 UART (universal asynchronous receiver-transmitter) for smart card communication. The device supports high-speed encryption with hardware accelerators for AES, RSA, DSA, ECDSA, SHA-1, SHA-224, SHA-256, DES, and 3DES. A true hardware random-number generator is included for key generation and challenge generation.
The device uses the 32-bit, pipelined, highly efficient MAXQ30 microcontroller core. It integrates 128KB flash memory, 12KB of volatile SRAM, 4KB of battery-backed erasable NV SRAM, and 256B of battery-backed, secure zeroization NV SRAM. An additional 1.5KB of volatile cryptographic memory can also be used as general-purpose data memory. The 256B of battery-backed NV SRAM can be used for key storage and other critical data. The 256B memory can be erased in less than 1µs using a single pulse ("rapid zeroization"), even in battery-backed mode.
The device is powered either from the USB bus or by a separate 3.3V voltage supply. A battery connection is provided for applications that want to maintain secret key data for years without draining the battery from application use. In battery-backed mode, the NV SRAM and security sensors consume less than 240nA (typ). Battery backup is optional; applications can choose to store critical data in the flash memory when the cost of the battery outweighs the benefits of constant monitoring for tamper conditions.