Participate in the on-going LowMC cryptanalysis challenge.
LowMC is a family of block ciphers tailored to minimize their multiplicative complexity. To serve different optimization needs, it offers a flexible parameter set that can be tuned to specific applications. It thus offers minimization of multiplicative depth, total number of multiplications, or multiplication per encrypted bit.
LowMC utilizes the proven SPN design strategy with some refinements. One such refinement is that the substitution layer is only partially filled with S-boxes leaving a part of the state untouched. The linear layers are fixed, pseudo-random affine mappings.