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Algebraic Methods in Cryptography 418 (2006) 103-119
Constructions in public-key cryptography over matrix groups
Dima Grigoriev 1, Ilia Ponomarenko 2
(2006)

The purpose of the paper is to give new key agreement protocols (a multi-party extension of the protocol due to Anshel-Anshel-Goldfeld and a generalization of the Diffie-Hellman protocol from abelian to solvable groups) and a new homomorphic public-key cryptosystem. They rely on difficulty of the conjugacy and membership problems for subgroups of a given group. To support these and other known cryptographic schemes we present a general technique to produce a family of instances being matrix groups (over finite commutative rings) which play a role for these schemes similar to the groups $Z_n^*$ in the existing cryptographic constructions like RSA or discrete logarithm.
1 :  Institut de Recherche Mathématique de Rennes (IRMAR)
CNRS : UMR6625 – Université de Rennes 1 – École normale supérieure de Cachan - ENS Cachan – Institut National des Sciences Appliquées (INSA) : - RENNES – Université de Rennes II - Haute Bretagne
2 :  Institut des Mathématiques. Saint Petersburg
Academie des Sciences
Mathématiques/Théorie des groupes

Informatique/Cryptographie et sécurité
public-key cryptosystems – matrix groups
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