 
Summary: Computational Secrecy by Typing for the Pi Calculus
Mart´in Abadi1,2
, Ricardo Corin1,3
, and C´edric Fournet1
1
Microsoft Research
2
University of California, Santa Cruz
3
University of Twente
Abstract. We define and study a distributed cryptographic implementation for
an asynchronous pi calculus. At the source level, we adapt simple type systems
designed for establishing formal secrecy properties. We show that those secrecy
properties have counterparts in the implementation, not formally but at the level
of bitstrings, and with respect to probabilistic polynomialtime active adversaries.
We rely on compilation to a typed intermediate language with a fixed scheduling
strategy. While we exploit interesting, previous theorems for that intermediate
language, our result appears to be the first computational soundness theorem for
a standard process calculus with mobile channels.
1 Introduction
