Geodesic
Cryptosystems in automorphism groups of group rings of Abelian groups
Fundamentalʹnaâ i prikladnaâ matematika, Tome 13 (2007) no. 3, pp. 157-164.

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We introduce a new class of public-key cryptosystems generalizing ElGamal cryptosystems to automorphism groups of group rings of abelian groups. A scheme of the basic variant of such a cryptosystem is presented and some types of attacks to it are considered. 
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S. K. Rososhek. Cryptosystems in automorphism groups of group rings of Abelian groups. Fundamentalʹnaâ i prikladnaâ matematika, Tome 13 (2007) no. 3, pp. 157-164. http://geodesic.mathdoc.fr/item/FPM_2007_13_3_a15/

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