Low energy ECC (Elliptic Curve Cryptography) library

Client: Cambridge Consultants

Contact: Alistair Morfey <alistair.morfey@cambridgeconsultants.com>

An increasing number of our projects need to include embedded security. This is particularly true as more devices expect to support remote software upgrades in the field throughout their installed life. We see this a lot in smart metering. Many of these devices are battery-powered and need to implement modern security algorithms at low energy. There are open source libraries available for symmetric (e,g AES-128) and asymmetric (e.g ECC 256 primes) crypto algorithms, but they are mainly aimed at computers and require far too much memory and energy. We have found good open source libraries for symmetric crypto algorithms that are suitable for low energy use in embedded systems with small memories. However we have not been able to find any suitable libraries for asymmetric crypto algorithms such as ECC-256p. The challenge is to develop such a portable code set for an embedded 32-bit or 16-bit processor with a small amount of memory (code flash and data RAM). It should identify clever techniques to minimise energy usage and memory requirements. It should be made available as open source software.