3 papers
cs.CR2006
Towards an information-theoretically safe cryptographic protocol
Pedro Fortuny Ayuso
We introduce what --if some kind of group action exists-- is a truly (information theoretically) safe cryptographic communication system: a protocol which provides \emph{zero} info…
math.DS2001
Ramifications, Reduction of Singularities, Separatrices
Pedro Fortuny Ayuso
We study the behaviour of sequences of blowing-ups under ramifications, and use the results to give a simple proof of Camacho-Sad's Theorem on the existence of Separatrices for sin…
math.AG2001
The Valuative Theory of Foliations
Pedro Fortuny Ayuso
We describe the valuations following infinitely near singular points of a (singular) holomorphic foliation in the complex plane. They appear to be those satisfying a generalization…