\bib{1983/brassard} \yr 1983 \by Gilles Brassard \paper On computationally secure authentication tags requiring short secret shared keys \inbook \cite{1983/chaum} \pages 79--86 \url http://cr.yp.to/\allowbreak bib/\allowbreak entries.html#\allowbreak 1983/\allowbreak brassard \endref