ROAST is part of a collaboration between Blockstream researchers Tim Ruffing and Elliott Jin, Viktoria Ronge and Dominique Schröder from the University of Erlangen-Nuremberg and Jonas Schneider-Bensch from the CISPA Helmholtz Center for Information Security.
Accompanying the blog post, the researchers also linked to a 13 page research paper which gives a run down of ROAST in greater detail.