This work will try to join two axis of research which concepts are in vogue. The first concerns the federated identity. The studies in this topic will allow the interconnection of information system, access to different resources and, above all, a secure and controlled sharing data. The implementation of such architectures required several exchanges of requests and responses which can be costly in terms of traffic data. So the second axis, namely mobile agents, intervenes to solve these problems. They offer the advantage of reducing the network load, to move the code to the data, to provide more faults tolerance... So this work seeks to take advantage of the benefits that can offer mobiles agents to improve the architecture of federated identity.