\newcommand{\randomsample}{\overset{{\scriptscriptstyle\$}}{\leftarrow}} \newcommand{\assign}{:=} \newcommand{\encoded}[1]{\underline{#1}} % EdDSA procedures \newcommand{\keygen}{KeyGen } \newcommand{\sign}{Sign } \newcommand{\verify}{Verify } % Oracle \newcommand{\Osign}{\textit{Sign} }