@inproceedings{1991-yacobi ,note={URL: {\tt http://cr.yp.to/\allowbreak bib/\allowbreak entries.html\#\allowbreak 1991/\allowbreak yacobi}} ,author={Yacov Yacobi} ,crossref={1991-damgard} ,MR={1 102 485} ,pages={222--229} ,title={{Exponentiating faster with addition chains}} ,year={1991} }