%0 Journal Article %A Kálmán Liptai %A Gábor Kusper %A Tibor Radványi %T Cryptographycal protocols in the Egerfood Information System %J Annales mathematicae et informaticae %D 2007 %P 61-70 %V 34 %I mathdoc %U http://geodesic.mathdoc.fr/item/AMI_2007_34_a7/ %G en %F AMI_2007_34_a7