Hi! You know this article: http://crypto.cs.mcgill.ca/~crepeau/PDF/ASPUBLISHED/ACDM06.pdf by: http://www.cs.mcgill.ca/people/faculty/profile?uid=crepeau I didn't know that there is a journal on this topic: http://www.elsevier.com/wps/find/journaldescription.cws_home/672380/description#description Mitar