%0 Journal Article %A D. Yu. Grigor'ev %A I. N. Ponomarenko %T On non-abelian homomorphic public-key cryptosystems %J Zapiski Nauchnykh Seminarov POMI %D 2002 %P 39-58 %V 293 %I mathdoc %U http://geodesic.mathdoc.fr/item/ZNSL_2002_293_a2/ %G ru %F ZNSL_2002_293_a2