| Ilia Ponomarenko |  |
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Date de l'exposé : 14 novembre 2003
On homomorpic public-key cryptosystems over groups and rings
We describe new public-key cryptosystems based on secret group and ring homomorphisms. For the group case, we use a secret embedding of a free group of rank 2 to the 2-dimensional modular group. For the ring case, we use a secret homomorphism induced by a secret group homomorphism of the corresponding multiplicative groups.
