• It looks like you have $m$ to be defined as a possible message (i.e. a value), and $n$ to be defined as (roughly) $|\mathcal{C}| = 2^n$, where $\mathcal{C}$ is the space of all possible ciphertexts (so something akin to the "dimension" of the space). Is this interpretation correct? If not, can you clarify what you mean by $n$ and $m$? – Mark Sep 20 '20 at 23:54