MSR Elliptic Curve Cryptography Library

MSR ECCLib is an efficient cryptography library that provides functions for computing essential elliptic curve operations on a new set of high-security curves.  All computations on secret data exhibit regular, constant-time execution, providing protection against timing and cache attacks.  The library is available for download below.

Library Features

• MSR ECCLib supports six high-security elliptic curves proposed in [2], which cover three security levels (128-, 192-, and 256-bit security) and two curve models. The curves have a very simple and deterministic generation with minimal room for parameter manipulation.
• It includes support for ECC functions necessary to implement most popular elliptic curve-based schemes. In particular, MSR ECCLib supports the computation of scalar multiplication for the six curves above in three variants:
  • Variable-base scalar multiplication (e.g., this is used for computing the shared key in the Diffie-Hellman key exchange).
  • Fixed-base scalar multiplication (e.g., this is used for key generation in the Diffie-Hellman key exchange).
  • Double-scalar multiplication. This operation is typically used for verifying signatures.

• MSR ECCLib offers full protection against timing and cache attacks by executing crypto-sensitive operations in constant-time with no correlation between timing and secret data.
• It achieves high performance without compromising security, portability and usability.
• MSR ECCLib is supported on a range of platforms, including x64, x86, and ARM devices running Windows or Linux.

New in Version 2.0

• Based upon feedback, MSR ECCLib 2.0 replaces the original twisted Edwards curves that were proposed in [1] with new twisted Edwards curves with a complete addition law.  See [2] and [3] for full details.