Coprocessor delivers authentication and physical security

The DS2477 DeepCover coprocessor has built-in 1-Wire master that combines FIPS202-compliant secure hash algorithm (SHA-3) challenge and response authentication with Maxim’s patented ChipDNA feature to provide a cost-effective solution with the ultimate protection against security attacks.

The device utilises the ChipDNA output as key content to cryptographically secure all device-stored data.

Attempts to probe or observe ChipDNA operation modifies the underlying circuit characteristics, which prevents discovery of the unique value used by the chip cryptographic functions.

The ChipDNA circuit, a physically unclonable technology, uses a random variation of semiconductor device characteristics that naturally occur during wafer fabrication.

It generates a unique output value that is repeatable over time, temperature, and operating voltage, and provides a core set of cryptographic tools derived from integrated blocks.