For questions involving/related to the Short Integer Solutions(SIS) problem.

Short integer solution (SIS) and ring-SIS problems are two average-case problems that are used in lattice-based cryptography constructions.

Lattice-based cryptography began in 1996 from a seminal work by Ajtai who presented a family of one-way functions based on SIS problem. He showed that it is secure in an average case if the shortest vector problem $\operatorname{SVP}_\gamma$ (where $\gamma = n^c$ for some constant $c > 0$ is hard in a worst-case scenario.