Gérard Schlosser : rétrospective, 1957-2013

Gérard Maze and Lorenz

Cryptography based on Semigroup Actions ∗ Gérard Maze

A generalization of the original Diffie-Hellman key exchange in (Z/pZ) found a new depth when Miller [27] and Koblitz [16] suggested that such a protocol could be used with the group over an elliptic curve. In this paper, we propose a further vast generalization where abelian semigroups act on finite sets. We define a Diffie-Hellman key exchange in this setting and we illustrate how to build in...

6 Dynamics of trap models Gérard

3 The one-dimensional trap model 9 3.1 The Fontes-Isopi-Newman singular diffusion . . . . . . . . . . . . . . . . 10 3.2 The scaling limit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 3.3 Aging results . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16 3.4 Subaging results . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17 3.5 Behaviour of t...

Identities , forgeries and disguises Gérard Chollet and

The preservation of your identity could become a major concern. In many situations, you need to claim an identity and this claim needs to be verified somehow. The technology called biometrics may help. But, what if a deliberate impostor claims your identity? Will this forgery be always detected? Biometric identity verification is imperfect. This paper reviews some of the techniques that a delib...

Isabelle Olivieri (1957–2016)

Isabelle Olivieri passed away on Saturday 10 December at 4 a.m. She passed away quietly after having fought not only with an admirable courage against her cancer but also against a paraneoplastic syndrome, which heavily handicapped her for the last years of her life. Isabelle would have passed 60 years in March 2017. She entered the Agronomic College (AgroParisTech) in Paris in 1977, specialize...