icon per scheme category

[thomwiggers]

Regarding the markers for the "Public key size/signature size" graph, instead of differentiating the schemes by "pre-quantum / standardized / broken candidate / not broken candidate", one alternative solution would be to have one shape of marker per family of post-quantum signatures. Since most people at this point want to know "is scheme X more efficient than scheme Y?", perhaps this could work better. You could then use the colors to differentiate between standardized / broken / not broken / pre-quantum