On November 6th XiTrust hosted a workshop on malleable signature schemes in Graz, Austria. Within the workshop Daniel Slamanig (TU Graz) and David Derler (TU Graz) presented theoretical capabilities of various types of malleable signature schemes. Then, there was a fruitful discussion with the organizer (Helmut Aschbacher) and various participants from XiTrust as well as Thomas Länger (University of Lausanne) on practical aspects and the applicability of malleable signatures within the E-Health use-case in PRISMACLOUD.