The Maxim DS2477, available from Mouser Electronics, is a secure I2C coprocessor with a built-in 1-Wire master that combines FIPS202-compliant Secure Hash Algorithm (SHA-3) challenge-response authentication with Maxim's patented ChipDNA™ feature to deliver a solution with maximum protection against security attacks.
The DS2477 uses the ChipDNA output as its key content to cryptographically protect all data stored on the device. Attempts to probe or observe the operation of ChipDNA alter the characteristics of the underlying circuitry, preventing the discovery of the unique value used by the chip's cryptographic functions. The ChipDNA circuit, a physically unclonable technology, utilizes a random variation of semiconductor device characteristics that occurs naturally during wafer fabrication. The circuit generates a unique output value that is repeatable over time, temperature, and operating voltage, and provides a core set of cryptographic tools derived from embedded blocks.
