Network coding is an efficient method for data transmission in networks. However, in many networks even a single hardware failure might render an entire transmission unreadable. Hence, in order to combat errors and erasures in network coding, subspace codes were introduced.
A subspace code is a family of subspaces over a finite field that intersect mutually in a small dimension. Since the set of all linear subspaces lacks a linear structure, cyclic subspace codes were defined through the natural action of the group of invertible matrices.
In this talk, several constructions of cyclic subspaces codes will be presented. A particular attention will be given to Sidon spaces, a newly defined algebraic notion, and their potential applications in post-quantum cryptography will be discussed.