  Cryptography is the discipline that allows securing of the exchange of
information. In this internship, we will focus on a certain branch of this
discipline, secure computation in a network. The main goal of this internship,
illustrated in this report, is to adapt a roster of protocols intended to do
linear algebra. We want to adapt them to do algebra for matrices with
polynomial coefficients. We then wish to make a complete analysis of the
different complexities of these protocols.
