FrodoKEM is a family of key-encapsulation mechanisms that are designed to be conservative yet practical post-quantum constructions whose security derives from cautious parameterizations of the well-studied learning with errors problem, which in turn has close connections to conjectured-hard problems on generic, algebraically unstructured lattices.
Concretely, FrodoKEM is designed for IND-CCA security at two levels:
Two variants of each of the above schemes are provided:
The AES variants are particularly suitable for devices having AES hardware acceleration (such as AES-NI on Intel platforms), while the cSHAKE variants generally provide competitive or better performance in comparison with the AES variants in the absence of hardware acceleration.
The inventors of FrodoKEM are:
Additional submitters for the FrodoKEM NIST submission are:
FrodoKEM builds on an extensive line of literature which is detailed in the specification.
You can contact the FrodoKEM team by emailing firstname.lastname@example.org.
The specification of FrodoKEM submitted to NIST on March 30, 2019, is available below:
Our submission package includes:
The implementations in the submission package support all six schemes: FrodoKEM-640-AES, FrodoKEM-640-cSHAKE, FrodoKEM-976-AES, FrodoKEM-976-cSHAKE, FrodoKEM-1344-AES, and FrodoKEM-1344-cSHAKE. The only difference between the reference and the optimized implementation is that the latter includes two efficient functions to generate the public matrix A and to compute the matrix operations AS + E and S'A + E'. Similarly, the only difference between the optimized and the additional implementation is that the latter uses AVX2 intrinsic instructions to speed up the implementation of the aforementioned functions. Hence, the different implementations share most of their codebase: this illustrates the simplicity of software based on FrodoKEM.
All our implementations avoid the use of secret address accesses and secret branches and, hence, are protected against timing and cache attacks.
Our GitHub project contains a version of our submission package code that is more amenable to building as a standalone library:
NIST Round 2 submission
NIST Round 1 submission
Copyright © FrodoKEM team 2017–2019.
FrodoKEM source code licensed under MIT License; see GitHub project for details.
Cover image by LoveToTakePhotos on pixabay.com.