%0 Conference Proceedings %A Goldman, Grigori %D 2007 %T Periodical Payment Model Using Restricted Proxy Certificates %E Dobbie, Gillian %B Thirtieth Australasian Computer Science Conference (ACSC2007) %C Ballarat Australia %I ACS %V 62 %P 131-139 %S CRPIT %! Periodical Payment Model Using Restricted Proxy Certificates %F CRPITV62-131-139 %Z abstract %U http://crpit.com/confpapers/CRPITV62Goldman.pdf