Embedded Security for Car Telematics and Infotainment

Elliptic Curve Cryptography appeared in 1985 and since became an increasingly important crypto-system in public-key cryptography. Numerous articles have come to improve the field. One of these milestones is Edwards Curves which appeared in 2007 and proposed advantageous properties against SPA attacks. This thesis proposes the design, implementation and comparison of several small co-processors in hardware acceleration work flow. We start from scratch the software implementation of a scalar multiplication of Edwards Curves defined over FP192 in projective coordinates. In a first phase, 8-bit, 16-bit, 32-bit multipliers interfaced on the parallel port of a 8051 are successively developed. Then, the system is improved again by the implementation of a memory mapped 192-bit broadcast multiplier including a modular reduction. These five hardware configurations combined to an assembly optimization finally furnish six versions which are compared on four axes : time, energy consumption, area and security. On the one hand the side-channel attack still exposes a SPA-weakness in the implementation of all the version. On the other hand, measures show the expected results that the 192-bit multiplier provides a faster and lower power system at the expense of multiplying the silicon area by three.